Release notes documentation:

Release notes documentation:
- r335640, pcap(3) 1.9.0 (pre-release).
- r338452, lastlogin(8) libxo(3) support.
- r338475, traceroute(8) capsicum support.
- r338707, pthread(3) POSIX compliance improvements.
- r339446, jail(8) allow.read_msgbuf parameter addition.
- r340369, TP-Link TL-WN321G uses run(4) instead of rum(4).
- r340963, makewhatis(1) do not operate on read-only directories.
- r341790, jail(8) '-e <parameter>' flag added.
- r342254, vt(4) uk.macbook.kbd keymap addition.
- r343118, trim(8) utility added.

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