for XPG conformance.  We don't use it but programs might check for it.

in some MAKEDEVs, will see to them in a separate commit.

commit, as we want our documentation to be as consistently formatted as
possible (it's getting there :-)).

http://playground.iijlab.net/i-d/draft-itojun-ipv6-transition-abuse-00.txt

with this `!' lines in /etc/hostname.* run even without certain lines
(like a comment) preceeding it.

appropriate mdoc macros to handle these cases.

depending on IFS).  This replaces the ed and sed code previously
used to do this.

least, this is the impression I get from looking at a lot of Perl docs.

Really, there should be a way to make configurable by the admin
at runtime (say, a gettmpdir() function).

when no neighboring router is found (rare case).  this is to conform
strictly to the ND spec.  it is safe to leave it empty.

(ok art@)

in sync with kame and bsdi.

this will help future apps from complexity of SIOCGIFCONF.
NOTE: getifaddrs(3) uses sysctl interface, not SIOCGIFCONF.

off_t to be visible in stdio.h even in strict ansi mode.  This is needed
for ftello()/fseeko() and it allows us to remove the horrible fpos_t hack.

Also make fsetpos() and fgetpos() use fseeko() and ftello() respectively
since fpos_t is actually a 64bit type.

is changed, based on discussion in ipngwg scoped address cabal.
past code:	fe80::1@de0
now:		de0%fe80::1
this will be in sync with next extended address format proposal
(which should be final - I don't want to make this kind of change again).

Allows visual editors to be used.

XXX shares database file with IPv4 one (0.0.127.in-addr.arpa)

rcmd(): IPv4 only
rcmd_af(): af independent
ruserok(): af independent
iruserok(): IPv4 only
iruserok_sa(): af independent