- 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

Cleanup of userland __P use

- poll(2) support.
- simplify by strdup.
- set ai_protocol in hints to TCP.
- g/c FAITH_NS (no description, not maintained for years)
- warn if connection from IPv4 mapped is reached.
- IPV6_V6ONLY if possible.
- unifdef -UFAITH4.
- drop rsh/rlogin support.
- deal with negative return value from wait3.

Obtained from: KAME

just merged cosmetic changes from KAME to ease sync between KAME and FreeBSD.
(based on freebsd4-snap-20020128)

Reviewed by: ume
MFC after: 1 week

Sync with recent KAME.
This work was based on kame-20010528-freebsd43-snap.tgz and some
critical problem after the snap was out were fixed.
There are many many changes since last KAME merge.

TODO:
- The definitions of SADB_* in sys/net/pfkeyv2.h are still different
from RFC2407/IANA assignment because of binary compatibility
issue. It should be fixed under 5-CURRENT.
- ip6po_m member of struct ip6_pktopts is no longer used. But, it
is still there because of binary compatibility issue. It should
be removed under 5-CURRENT.

Reviewed by: itojun
Obtained from: KAME
MFC after: 3 weeks

Sync with latest KAME.

Obtained from: KAME

another tcp apps IPv6 updates.(should be make world safe)
ftp, telnet, ftpd, faithd
also telnet related sync with crypto, secure, kerberosIV

Obtained from: KAME project