- 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

ICMPV6_FILTER should read ICMP6_FILTER.

Submitted by: Frédéric Perrin <frederic.perrin resel.fr>
MFC after: 2 weeks

Globally replace u_int*_t from (non-contributed) man pages.

The reasoning behind this, is that if we are consistent in our
documentation about the uint*_t stuff, people will be less tempted to
write new code that uses the non-standard types.

I am not going to bump the man page dates, as these changes can be
considered style nits. The meaning of the man pages is unaffected.

MFC after: 1 month

Fix a bunch of typos and spelling mistakes.

Assorted markup fixes and minor wordsmithing.

Approved by: re

Fixed the misplaced $FreeBSD$.

Submitted by: George V. Neville-Neil (gnn at freebsd dot org)
Reviewed by: Kame Project (including Itojun-san, Jinmei-san and Suzuki-san)
Approved by: Robert Watson (robert at freebsd dot org)
Obtained from: Kame Project and OpenBSD

Replace manual pages that may have violated the IETF's Copyright.

All come from the Kame tree.

Several were from OpenBSD except for ip6.4, and the inet6* pages which were
rewritten by me.

All of the text is new and drawn from reading the code and
documentation.