release_notes_3120

Release Notes

jail -c: Do not create a filesystem with -m none [may come out #469]
ports -c: Don't try removing a filesystem that was not created [may come out #469]
pwait: Fix kern.randompid hangs
queue: Fix for sending commands to poudriered [not well supported]
jail -u: Don't run freebsd-update update for PRERELEASE, STABLE or CURRENT jails.
jail -c: Don't allow creating a jail when its mountpoint already exists
XDEV: Attempt to link /usr/bin/makewhatis
sh: Update from FreeBSD head r319826
sh: Enable nofork for clock, dirempty and realpath commands.
jail -u: Only run freebsd-install if needed
bulk CHECK_CHANGED_DEPS: Only run ldconfig -r once for the entire build rather than for every package.
poudriere: Allow MAKEOBJDIRPREFIX from command environment.
poudriere: Force umask 022 and allow override with UMASK in poudriere.conf
Default RESOLV_CONF to host's /etc/resolv.conf
jail -k: Don't force having a portstree for cleanup
Fix MNAMELEN check consistency (2 different length paths were being used for calculations)
Nested jails:
- Don't force allow.socket_af, allow.raw_sockets, allow.chflags, allow.sysvipc
- Don't use allow.socket_af, allow.raw_sockets in the no-networking jail.
- Check for and error if the follow flags are not enabled:
  - enforce_statfs=1, allow.mount, allow.mount.devfs, allow.mount.nullfs, allow.mount.tmpfs
  - children.max is not properly exposed in a nested jail and so is not checked.