More RELENG_7 release notes trimmings, removing more notes for features that have already appeared in prior FreeBSD releases.
More RELENG_7 release notes trimmings, removing more notes for
features that have already appeared in prior FreeBSD releases.

Approved by:	re (implicitly)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase