- 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

Remove most of the remaining sysctl name list macros. They were only
ever intended for use in sysctl(8) and it has not used them for many
years.

Reviewed by: bde
Tested by: exp-run by bdrewery

Migrate structs arpstat, icmpstat, mrtstat, pimstat and udpstat to PCPU
counters.

Prepare network statistics structures for migration to PCPU counters.
Use uint64_t as type for all fields of structures.

Changed structures: ahstat, arpstat, espstat, icmp6_ifstat, icmp6stat,
in6_ifstat, ip6stat, ipcompstat, ipipstat, ipsecstat, mrt6stat, mrtstat,
pfkeystat, pim6stat, pimstat, rip6stat, udpstat.

Discussed with: arch@

Virtualize the IPv4 multicast routing code.

Submitted by: iprebeg
Reviewed by: bms, bz, Pavlin Radoslavov
MFC after: 30 days

Update stats in struct pimstat using two new macros: PIMSTAT_ADD()
and PIMSTAT_INC(), rather than directly manipulating the fields of
the structure. This will make it easier to change the
implementation of these statistics, such as using per-CPU versions
of the data structure.

MFC after: 3 days

Remove public declarations of variables that were forgotten when they were
made static.

/* -> /*- for license, minor formatting changes

New PIM header files.

Submitted by: Pavlin Radoslavov <pavlin@icir.org>