Merge r257633:

- Add manual pages for capability rights (rights(4)), cap_rights_init(3)
  family of functions and cap_rights_get(3) function.
- Update remaining Capsicum-related manual pages.

Sponsored by:	The FreeBSD Foundation
Reviewed by:	bdrewery
Approved by:	re (glebius)
MFC r257641:
 When building the textproc/docproj port, the ports-mgmt/pkg port
 needs /var/run/ld-elf*.so.hints, which is not automatically created.

 Fix reldoc build by running the ldconfig(8) startup script in the
 chroot directory before starting the port build phase.

Approved by:	re (kib)
Sponsored by:	The FreeBSD Foundation
MFC r257667:

  Enable fingerprint checking as the currently known
  fingerprint has an uploaded signature on all mirrors.

Approved by:	bapt
Approved by:	re (gjb)
MFC r257668:

  Use proper capitalization for FreeBSD.org

Approved by:	bapt
Approved by:	re (gjb)
MFC r257801 (gabor):
 - Syncronize stable/10/release/doc with head/ in followup to
   the docbook5.0 update to the doc/ repository.

Approved by:	re (delphij)
Sponsored by:	The FreeBSD Foundation
Merge branch 'stable/10' of https://github.com/freebsd/freebsd into stable/10
Tag 10-STABLE-p3