MFC r273087 (with modifications):

  Overhaul if_gif(4):
   o convert to if_transmit;
   o use rmlock to protect access to gif_softc;
   o use sx lock to protect from concurrent ioctls;
   o remove a lot of unneeded and duplicated code;
   o remove cached route support (it won't work with concurrent io);
   o style fixes.

MFC r273090:
  Move memset under ifdef INET6.

MFC r273091:
  Add more ifdefs. SIOC*_IN6 are defined only with INET6.

MFC r273121:
  Add inet/inet6 to the dependency list. Without them if_gif is useless.

MFC r273209 by bz:
  After r273087,r273090,r273091,r273121 changes to gif(4) try to fix
  NOIP builds for real.

MFC r273587:
  Remove redundant check and m_pullup() call.

1 files changed, 1 insertions, 11 deletions

diff --git a/share/man/man4/gif.4 b/share/man/man4/gif.4
index 453b4bd..27ee61b 100644
--- a/share/man/man4/gif.4
+++ b/share/man/man4/gif.4
@@ -29,7 +29,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 1, 2011
+.Dd October 14, 2014
 .Dt GIF 4
 .Os
 .Sh NAME
@@ -160,16 +160,6 @@ routed network.
 It can be turned off by
 .Dv IFF_LINK2
 bit.
-.Ss Route caching
-Processing each packet requires two route lookups: first on the
-packet itself, and second on the tunnel destination.
-This second route can be cached, increasing tunnel performance.
-However, in a dynamically routed network, the tunnel will stick
-to the cached route, ignoring routing table updates.
-Route caching can be enabled with the
-.Dv IFF_LINK0
-flag.
-.\"
 .Ss Miscellaneous
 By default,
 .Nm