Matthew Dillon announced the new DragonFly 2.2.1 sub-release.
that brings several improvements and bug-fixes.

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Kernel changes

• Fixes for libthread_xu: MAP_STACK and an errno leak.

Hardware changes

• Bug fixes for sppp(4), and i4b(4).
• Fixed recursive lock in detached close of /dev/tty.

HAMMER changes

• HAMMER VFS: Added missing hammer_rel_volume() call in deadlock/retry case.

Networking changes

• Allowed the IP_MINTTL socket option to be set to zero.

Release improvements

• Fixed an installworld failure due to kernel fixes and a libthread_xu issue.
• Installer now works correctly in the console, and properly creates device files if they don't exist.

Userland changes

• Updates for msdosfs, pax(1), and magic(3)
• Allowed uid/gid/flags changes to fail if running cpdup as a user

Contributed software

• Synced zoneinfo database with tzdata2009f from elsie.

Security updates

• FreeBSD-SA-09:05.telnet - fix environment based code execution vulnerability