Release notes documentation:

Release notes documentation:
- r336449, setproctitle_fast(3) addition.
- r337418, kqueue(2) allow EVFILT_TIMER updates.
- r338405, pthread_get_name_np(3) addition.
- r339857, ddb(4) option to print process arguments added.
- r340182, ichwd(4) support for Lewisburg PCH TCO watchdog timer.
- r341828, ZFS vnode reclaimation deadlock fixed.
- r342206, lagg(4) allow changing MTU without destroying interface.
- r342656, x86 MSI IRQs are now tunable.
- r343084, jail(8) IDs printed when logging a process exit.
- r344399, zfsloader functionality now part of loader(8).
- r344399, loader(8) GELI support extended to all architectures.
- r344403, efi guess console device/type if not defined.
- r345040, ccr(4) driver addition.
- r345981, random(4) reseeding performance improvements.

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