Update the hardware page to reflect CPU updates/additions
added in head@r273941.

Since the original commit requires changes to the doc/
repository after the release tag had already happened,
(re)define entities in share/xml/release.ent that reflect
doc@r45900 to prevent build breakage.

Requested by:	gavin
Approved by:	re (implicit, relnotes)
Sponsored by:	The FreeBSD Foundation
MFstable10 r274102:
  MFC r274095:
  Fix VOLUME_LABEL when BRANCH contains '-' and '.'
  characters.

Approved by:	re (hrs)
Sponsored by:	The FreeBSD Foundation
[SA-14:25] Fix kernel stack disclosure in setlogin(2) / getlogin(2).
[SA-14:26] Fix remote command execution in ftp(1).

Approved by:	re (gjb)
MFC r274128:

Add the less-ambiguous freebsd-version command.

Approved by:	re
Document SA-14:25, SA-14:26

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