* Ability to feed nncp-file from stdin, that uses an encrypted temporary
file for that.
* Chunked files transmission appeared with corresponding nncp-reass
command and freqchunked configuration file entry. Useful for
transferring big files over small storage devices.
* freqminsize configuration file option, analogue to -minsize one.
* nncp-xfer's -force option is renamed to -mkdir for clarity.
* -minsize option is specified in KiBs, not bytes, for convenience.
* nncp-newcfg command is renamed to nncp-cfgnew, and nncp-mincfg to
nncp-cfgmin -- now they have common prefix and are grouped together
for convenience.
* nncp-cfgenc command appeared, allowing configuration file
encryption/decryption, for keeping it safe without any either OpenPGP
or similar tools usage.
* Cryptographic libraries (dependencies) are updated.
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