find: Return normal exit status from -quit.

If there was an error, make the exit status reflect this even if -quit
caused the exit. Formerly, -quit always caused exit(0).

GNU find does the same.
Add FreeBSD 10.1 to the list of recognized releases for Fx.

This version is already mentioned by 4 manual pages.
Miscellaneous fixes to tests(7).

- Properly capitalize "FreeBSD Test Suite".
- At this point, the test suite first appeared in 10.1, not in 11.0.
- Use my FreeBSD.org address.