New release notes:
vkbd(4) added,
acpi_snc added,
gx(4) removed,
old vinum(4) removed,
libxpg4 removed,
a separate directory for named(8) dynamic zones added,
rm(1) SUSv3 conformance,
strftime(3) GNU extensions added, and
rc.conf(5) variables: tmpmfs_flags and varmfs_flags.

Update release notes:
Fix a typo (s/machine-indepedent/machine-independent/).