MFC r254020:
Add a missing module version declaration to if_tun(4).
MFC r253850:
Properly print arguments to vfork(2) and rfork(2).
MFC: Temporarily revert sendmail 8.14.7 change to getipnodebyname() flags
     to prevent problems between the resolver and Microsoft DNS servers with
     AAAA lookups.  The upstream open source project will work on a more
     permanent fix for the next release.  Issue noted by Pavel Timofeev.
MFC r254338:

Don't send uninitialized memory (two instances of 4 bytes) in
every cookie on the wire. This bug was reported in
https://bugzilla.mozilla.org/show_bug.cgi?id=905080
MFC r254191:
Match malloc(9) calls with free(9), not contigfree(9).