See also this page @ref{Новости, on russian}.
+@node Release 5.5.1
+@section Release 5.5.1
+@itemize
+
+@item
+Respect for @env{BINDIR}, @env{INFODIR} and @env{DOCDIR} environment
+variables in @file{config} during installation.
+
+@end itemize
+
+@node Release 5.5.0
+@section Release 5.5.0
+@itemize
+
+@item
+Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
+@command{nncp-bundle} and @command{nncp-stat}.
+
+@item
+@command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
+
+@item
+@command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
+options now. Uncompressed packets are not compatible with previous NNCP
+versions.
+
+@item
+@command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
+have @option{-autotoss*} options for running tosser after call is ended.
+
+@item
+Updated dependencies. Minimal required Go version is 1.12.
+
+@end itemize
+
+@node Release 5.4.1
+@section Release 5.4.1
+@itemize
+
+@item
+Fixed @code{SENDMAIL} variable usage during the build.
+
+@end itemize
+
+@node Release 5.4.0
+@section Release 5.4.0
+@itemize
+
+@item
+Updated dependencies.
+
+@item
+Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
+This should not influence package maintainers, because minimal @command{redo}
+implementation is included in tarball.
+
+@end itemize
+
+@node Release 5.3.3
+@section Release 5.3.3
+@itemize
+
+@item
+More various error checks.
+
+@item
+Updated dependencies.
+
+@end itemize
+
+@node Release 5.3.2
+@section Release 5.3.2
+@itemize
+
+@item
+Fixed incorrect logic of @option{onlinedeadline} timeout, where
+connection won't take into account incoming packets events and will
+forcefully disconnect.
+
+@end itemize
+
+@node Release 5.3.1
+@section Release 5.3.1
+@itemize
+
+@item
+Fixed @option{onlinedeadline} workability with call addresses that use
+external commands (@verb{#"|somecmd"#}).
+
+@item
+@command{nncp-stat} has @option{-pkt} option displaying information
+about each packet in the spool.
+
+@end itemize
+
+@node Release 5.3.0
+@section Release 5.3.0
+@itemize
+
+@item
+Progress messages contain prefix, describing the running action.
+
+@item
+Fixed not occurring handshake messages padding.
+
+@item
+Finish all SP protocol related goroutines, less memory leak.
+
+@item
+SP protocol generates less socket write calls, thus generating less TCP
+packets.
+
+@item
+Check @option{onlinedeadline} and @option{maxonlinetime} options every
+second, independently from socket reads (up to 10 seconds).
+
+@item
+Once per minute, if no other traffic exists, PING packets are sent in
+SP-connection. That allows faster determining of connection unworkability.
+
+@item
+@command{nncp-toss} uses lock-file to prevent simultaneous tossing.
+
+@end itemize
+
+@node Release 5.2.1
+@section Release 5.2.1
+@itemize
+
+@item
+Fixed SP protocol error handling, sometimes causing program panic.
+
+@end itemize
+
+@node Release 5.2.0
+@section Release 5.2.0
+@itemize
+
+@item
+Most commands by default show oneline operations progress.
+@option{-progress}, @option{-noprogress} command line options,
+@option{noprogress} configuration file option appeared.
+
+@item
+Fixed incorrect @command{nncp-check} command return code, that returned
+bad code when everything is good.
+
+@item
+Free disk space check during @command{nncp-bundle -rx} call.
+
+@end itemize
+
+@node Release 5.1.2
+@section Release 5.1.2
+@itemize
+
+@item
+@strong{Critical} vulnerability: remote peers authentication could lead
+to incorrect identification of remote side, allowing foreign encrypted
+packets downloading.
+
+@item
+Bugfix: private and public Noise keys were swapped in newly created
+configuration files, that lead to inability to authenticate online peers.
+
+@item
+Explicit directories fsync-ing for guaranteed files renaming.
+
+@end itemize
+
+@node Release 5.1.1
+@section Release 5.1.1
+@itemize
+
+@item
+Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
+
+@end itemize
+
+@node Release 5.1.0
+@section Release 5.1.0
+@itemize
+
+@item
+@command{nncp-file} can send directories, automatically creating pax
+archive on the fly.
+
+@item
+Free disk space is checked during outbound packets creation.
+
+@item
+@option{freq}, @option{freqminsize}, @option{freqchunked} configuration
+file options replaced with the structure:
+@option{freq: @{path: ..., minsize: ..., chunked: ...@}}.
+
+@item
+Added @option{freq.maxsize} configuration file option, forbidding of
+freq sending larger than specified size.
+
+@item
+Ability to notify about successfully executed commands (exec) with
+@option{notify.exec} configuration file option.
+
+@end itemize
+
+@node Release 5.0.0
+@section Release 5.0.0
+@itemize
+
+@item
+@strong{Incompatible} configuration file format change: YAML is
+replaced with Hjson, due to its simplicity, without noticeable lack
+of either functionality or convenience.
+
+@item
+@strong{Incompatible} plain packet format changes. Older versions are
+not supported. @code{zlib} compression is replaced with
+@code{Zstandard}, due to its speed and efficiency, despite library
+version is not mature enough.
+
+@item
+Ability to call remote nodes via pipe call of external command, not only
+through TCP.
+
+@item
+@command{nncp-cfgnew} generates configuration file with many
+comments. @option{-nocomments} option can be used for an old
+behaviour.
+
+@item
+Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
+avoid possible collisions with @file{.nncp.chunkCTR}.
+
+@item
+Ability to override process umask through configuration file option.
+
+@item
+Files and directories are created with 666/777 permissions by default,
+allowing control with @command{umask}.
+
+@item
+Updated dependencies.
+
+@item
+Full usage of go modules for dependencies management
+(@code{go.cypherpunks.ru/nncp/v5} namespace is used).
+
+@item
+Forbid any later GNU GPL version autousage
+(project's licence now is GNU GPLv3-only).
+
+@end itemize
+
+@node Release 4.1
+@section Release 4.1
+@itemize
+@item Workability on GNU/Linux systems and Go 1.10 is fixed.
+@end itemize
+
+@node Release 4.0
+@section Release 4.0
+@itemize
+
+@item
+@strong{Incompatible} encrypted and eblob packet format change: AEAD
+encryption mode with 128 KiB blocks is used now, because previously
+@command{nncp-toss} did not verify encrypted packet's MAC before feeding
+decrypted data to external command. Older versions are not supported.
+
+@item
+Available free space checking before copying in @command{nncp-xfer},
+@command{nncp-daemon}, @command{nncp-call(er)}.
+
+@item
+@command{nncp-call} has ability only to list packets on remote node,
+without their transmission.
+
+@item
+@command{nncp-call} has ability to transfer only specified packets.
+
+@item
+Workability of @option{xxrate} preference in @option{calls}
+configuration file section.
+
+@item
+Dependant libraries are updated.
+
+@item
+Minor bugfixes.
+
+@item
+Begin using of @code{go.mod} subsystem.
+
+@end itemize
+
+@node Release 3.4
+@section Release 3.4
+@itemize
+@item @command{nncp-daemon} can be run as @command{inetd}-service.
+@end itemize
+
+@node Release 3.3
+@section Release 3.3
+@itemize
+
+@item
+@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
+if @file{.seen} exists and treat it like file was already downloaded.
+Possibly it was transferred out-of-bound and remote side needs to be
+notifier about that.
+
+@item
+If higher priority packet is spooled, then @command{nncp-daemon} will
+queue its sending first, interrupting lower priority transmissions.
+
+@item
+Simple packet rate limiter added to online-related tools
+(@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
+
+@item
+Ability to specify niceness with symbolic notation:
+@verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
+
+@item
+Changed default niceness levels:
+for @command{nncp-exec} from 64 to 96,
+for @command{nncp-freq} from 64 to 160,
+for @command{nncp-file} from 196 to 224.
+
+@end itemize
+
+@node Release 3.2
+@section Release 3.2
+@itemize
+@item
+@strong{Incompatible} @emph{bundle} archive format changes and
+@command{nncp-bundle} workability with Go 1.10+. Bundles must be
+valid tar archives, but Go 1.9 made them invalid because of long paths
+inside. NNCP accidentally was dependant on that bug. Explicit adding of
+@file{NNCP/} directory in archive restores workability with valid tar
+archives.
+@end itemize
+
+@node Release 3.1
+@section Release 3.1
+@itemize
+@item
+Ability to disable relaying at all using @verb{|-via -|} command line option.
+@end itemize
+
+@node Release 3.0
+@section Release 3.0
+@itemize
+
+@item
+@strong{Incompatible} plain packet format changes. Older versions are
+not supported.
+
+@item
+Ability to queue remote command execution, by configuring @option{exec}
+option in configuration file and using @command{nncp-exec} command:
+ @itemize
+ @item
+ @command{nncp-mail} command is replaced with more flexible
+ @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
+ you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
+ @item
+ @option{sendmail} configuration file option is replaced with
+ @option{exec}. @verb{|sendmail: [...]|} must be replaced with
+ @verb{|exec: sendmail: [...]|}.
+ @end itemize
+
+@item
+Ability to override @option{via} configuration option for destination
+node via @option{-via} command line option for following commands:
+@command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
+
+@item
+Chunked files, having size less than specified chunk size, will be sent
+as an ordinary single file.
+
+@item
+Exec commands are invoked with additional @env{NNCP_NICE} and
+@env{NNCP_SELF} environment variables.
+
+@item
+Files, that are sent as a reply to freq, have niceness level taken from
+the freq packet. You can set desired niceness during @command{nncp-freq}
+invocation using @option{-replynice} option.
+
+@item
+@command{nncp-toss} command can ignore specified packet types during
+processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
+@option{-notrns}.
+
+@item
+@command{nncp-file} command uses
+@option{FreqMinSize}/@option{FreqChunked} configuration file options
+for @option{-minsize}/@option{-chunked} by default. You can turn this
+off by specifying zero value.
+
+@end itemize
+
@node Release 2.0
@section Release 2.0
@itemize
+
@item
@strong{Incompatible} encrypted/eblob packet format changes. Older
versions are not supported.
+
@item
Twofish encryption algorithm is replaced with ChaCha20. It is much more
faster. One cryptographic primitive less.
+
@item
HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
another cryptographic primitive less (assuming that BLAKE2X is nearly
identical to BLAKE2).
+
@end itemize
@node Release 1.0
@section Release 1.0
@itemize
+
@item
@strong{Incompatible} encrypted packet format changes. Older versions
are not supported.
+
@item
@command{nncp-bundle} command can either create stream of encrypted
packets, or digest it. It is useful when dealing with stdin/stdout based
transmission methods (like writing to CD-ROM without intermediate
prepared ISO image and working with tape drives).
+
@item
@command{nncp-toss} is able to create @file{.seen} files preventing
duplicate packets receiving.
+
@item
Single background checksum verifier worker is allowed in
@command{nncp-call}. This is helpful when thousands of small inbound
packets could create many goroutines.
+
@item
Ability to override path to spool directory and logfile through either
command line argument, or environment variable.
+
@item
@command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
@file{.part}, @file{.lock} and temporary files.
+
@end itemize
@node Release 0.12
@section Release 0.12
@itemize
-@item
-Sendmail command is called with @env{NNCP_SENDER} environment variable.
+@item Sendmail command is called with @env{NNCP_SENDER} environment variable.
@end itemize
@node Release 0.11
@section Release 0.11
@itemize
-@item
-@command{nncp-stat}'s command output is sorted by node name.
+@item @command{nncp-stat}'s command output is sorted by node name.
@end itemize
@node Release 0.10
@node Release 0.7
@section Release 0.7
@itemize
+
@item
Ability to feed @command{nncp-file} from stdin, that uses an encrypted
temporary file for that.
@item
Cryptographic libraries (dependencies) are updated.
+
@end itemize
@node Release 0.6
@node Release 0.5
@section Release 0.5
@itemize
-@item Trivial small fix in default niceness level of @command{nncp-file}
+@item
+Trivial small fix in default niceness level of @command{nncp-file}
and @command{nncp-freq} commands.
@end itemize
@node Release 0.4
@section Release 0.4
@itemize
-@item Small fix in @command{nncp-call}, @command{nncp-caller},
+
+@item
+Small fix in @command{nncp-call}, @command{nncp-caller},
@command{nncp-daemon}: they can segmentation fail sometimes (no data is
lost).
-@item @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is
-shorter and more convenient to use.
-@item @command{nncp-mincfg} command appeared: helper allowing to create
-minimalistic stripped down configuration file without private keys,
-that is useful during @command{nncp-xfer} usage.
+
+@item
+@command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
+and more convenient to use.
+
+@item
+@command{nncp-mincfg} command appeared: helper allowing to create
+minimalistic stripped down configuration file without private keys, that
+is useful during @command{nncp-xfer} usage.
+
@end itemize
@node Release 0.3
@section Release 0.3
-Fixed compatibility with Go 1.6.
+@itemize
+@item Fixed compatibility with Go 1.6.
+@end itemize
@node Release 0.2
@section Release 0.2
@itemize
-@item @strong{Incompatible} packet's format change (magic number is
-changed too): size field is encrypted and is not send in plaintext
-anymore.
-@item @option{-minsize} option gives ability to automatically pad
-outgoing packets to specified minimal size.
-@item @command{nncp-daemon} and
-@command{nncp-call}/@command{nncp-caller} always check new @emph{tx}
-packets appearance in the background while connected. Remote side is
-immediately notified.
-@item @option{-onlinedeadline} option gives ability to configure timeout
-of inactivity of online connection, when it could be disconnected. It
-could be used to keep connection alive for a long time.
-@item @option{-maxonlinetime} option gives ability to set maximal
-allowable online connection aliveness time.
-@item @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
-@item @command{nncp-pkt} command can decompress the data.
+
+@item
+@strong{Incompatible} packet's format change (magic number is changed
+too): size field is encrypted and is not send in plaintext anymore.
+
+@item
+@option{-minsize} option gives ability to automatically pad outgoing
+packets to specified minimal size.
+
+@item
+@command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
+always check new @emph{tx} packets appearance in the background while
+connected. Remote side is immediately notified.
+
+@item
+@option{-onlinedeadline} option gives ability to configure timeout of
+inactivity of online connection, when it could be disconnected. It could
+be used to keep connection alive for a long time.
+
+@item
+@option{-maxonlinetime} option gives ability to set maximal allowable
+online connection aliveness time.
+
+@item
+@command{nncp-caller} command appeared: cron-ed TCP daemon caller.
+
+@item
+@command{nncp-pkt} command can decompress the data.
+
@end itemize