- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Mechanically kill hard sentence breaks.

mdoc(7) fixes.

Approved by: re (blanket)

Add a cwd option which specifies where to chdir(2) after the chroot(2).
When using the /home/./foo scheme, this defaults to the rhs (/foo);
otherwise it defaults to /.

Experimental pam_chroot module (not connected to the build)