+@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
+