Trim release notes for 7.0 to remove items for features, bugfixes, etc. that appeared in prior FreeBSD releases.  This change is based on reviewing the release notes for 6.1-RELEASE and 6.2-RELEASE.
Trim release notes for 7.0 to remove items for features, bugfixes,
etc. that appeared in prior FreeBSD releases.  This change is based on
reviewing the release notes for 6.1-RELEASE and 6.2-RELEASE.

There's still some more work to be done here but this is a good
checkpoint.

Approved by:	re (implicitly)
Discussed with:	hrs

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