import newest libpcap
merge changes
Add BPF_MOD/BPF_XOR (untested, needs work)
Add BPF_MOD/BPF_XOR, sync DLT entries and document unused bpf instructions.
From libpcap-1.6.2
new man pages for libpcap.
Add BPF_XOR tests.
Import tcpdump 4.6.2
compile xftrender.c to workaround a crash in XftGlyphSpecRender on earm with gcc 4.8.4
merge conflicts
new tcpdump and libpcap
l in ntohl is not long!
Add atomic_c11_compare_exchange_cas_{8,16,32}.c
Handle warning messages.
 Move some printf()s from cpu_probe_base_features() to identifycpu().
Those printf()s are used for "identify" command but cpu_probe_base_features()
is shared by ucodeupdate_check(), too. This change fixes a problem that
the "ucode" command print extra output.
Add BPF_MOD tests. Plus one tiny change.
Add BPF_MOD tests. Plus one tiny change.
 Fix manual and usage bug. The ucode command can take [cpuno] argument.
Bump date. Quote minus with a backslash, for PostScript/PDF output.
Follow argument convension of other emit_xxx() functions.
Make it clear that we should use not callout_stop but callout_halt before callout_destroy