Update release notes:
DDB show mount added,
sparc64 US III support,
DRM r600/r700,
ae(4) WoL support,
hardware MAC stats: cxgb(4), msk(4), nfe(4),
re(4) hw.re.prefer_iomap,
sis(4) VLAN tagging bugfix,
txp(4) update,
TCP MD5 signature option for IPv6,
gpart(8) updated; APM and EBR scheme support,
mpt(4) in GENERIC on sparc64,
vfs.nfs.prime_access_cache for NFSv3,
ncal(1) multibyte support,
csup CVSMode support,
du(1) -A and -B option added,
makefs(8) added, and
mergemaster(8) -F option added.
Approved by: re (implicit)
git-svn-id: svn://svn.freebsd.org/base/releng/7.2@191602
ccf9f872-aa2e-dd11-9fc8-
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