only perform tcp wrappers checks when the incoming connection is on a
socket. silences useless warnings from regress tests that use
proxycommand="sshd -i". prompted by david@ ok markus@
+ - djm@cvs.openbsd.org 2004/06/24 19:32:00
+ [regress/Makefile regress/test-exec.sh, added regress/reexec.sh]
+ regress test for re-exec corner cases
20040623
- (dtucker) [auth1.c] Ensure do_pam_account is called for Protocol 1