- 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

- Use time_uptime instead of time_second in data structures for
PF_INET6 in kernel. This fixes various malfunction when the wall time
clock is changed. Bump __FreeBSD_version to 1000041.

- Use clock_gettime(CLOCK_MONOTONIC_FAST) in userland utilities.

MFC after: 1 month

Clean up VCS Ids.

ANSIfy[1] plus some style cleanup nearby.

Discussed with: gnn, rwatson
Submitted by: Karl Sj?dahl - dunceor <dunceor gmail com> [1]
Approved by: re (rwatson)

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

Get rid of the RANDOM_IP_ID option and make it a sysctl. NetBSD
have already done this, so I have styled the patch on their work:

1) introduce a ip_newid() static inline function that checks
the sysctl and then decides if it should return a sequential
or random IP ID.

2) named the sysctl net.inet.ip.random_id

3) IPv6 flow IDs and fragment IDs are now always random.
Flow IDs and frag IDs are significantly less common in the
IPv6 world (ie. rarely generated per-packet), so there should
be smaller performance concerns.

The sysctl defaults to 0 (sequential IP IDs).

Reviewed by: andre, silby, mlaier, ume
Based on: NetBSD
MFC after: 2 months

add randomtab for ip6_randomflowlabel().

Obtained from: KAME

randomize IPv6 flowlabel when RANDOM_IP_ID is defined.

Obtained from: KAME

include opt_random_ip_id.h

Don't compiled ip6_randomid() in if RANDOM_IP_ID is not defined.

randomize IPv6 fragment ID.

Obtained from: KAME