- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Merge tcpdump 4.2.1.

MFC after: 2 weeks

This commit was generated by cvs2svn to compensate for changes in r146773,
which included commits to RCS files with non-trunk default branches.

Virgin import of tcpdump v3.9.1 (alpha 096) from tcpdump.org