avoid port 1023 more

call rcmdsh() if euid != 0 and port is shell/tcp. This lets us
get away with fewer setuid binaries.

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

seed rresvport() for aux channel with a known taken port; do not ask for
next lower port because we might get it (and be predictable!)

if port 20 incoming, kill it and try again

ensure bindresvport() is told to find a port

rresvport() in terms of bind() & bindresvport()

bzero sockaddr_in

bzero sockaddr before use

support # comments

iruserok() can finally safely use a u_int32_t for the ip addr

fix long/u_int32_t botch; do gethostbyname() only if netgroups are going to
be used and do not abort; check for A->PTR->A loop otherwise only match on
#.#.#.# addresses; do not assume !0 is 1 as in A

fix long/u_int32_t botch; do gethostbyname() only if netgroups are going to
be used and do not abort; check for A->PTR->A loop otherwise only match on
#.#.#.# addresses; do not assume !0 is 1 as in ANSI C. netbsd pr#1683 led to
finding these problems.

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initial import of NetBSD tree