- 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

MFV: libpcap 1.4.0.

MFC after: 4 weeks

MFV: libpcap 1.3.0.

MFC after: 4 weeks

Merge from vendor branch: update libpcap to 1.2.1.

MFC after: 2 weeks

Merge libpcap-1.1.1.

Revert previous commit that commented out some bpf functions.
Unconstify arguments of bpf_image(), bpf_filter() and bpf_dump(). This
is needed because some ports rely heavely on these arguments (some of
them even roll out their own implemenentations of bpf_dump).

Restore local change to include <sys/bpf.h> inside pcap.h. This fixes
remaining ports build problems.

bpf_filter() and bpf_validate() can't live here if they already live in
bpf.h

Merge libpcap 1.0.0.

Import of libpcap 1.0.0.