revert r1.11 of parse.y and create logic in conf_setup instead to deal

with the various scenarios of when to attempt a parse of the config,
load defaults, and when to warn and/or exit.  triggered by bogus warning
first noticed by sobrado@.

ok oga@

parse.y

@@ -462,8 +462,6 @@ pushfile(const char *name)
 	nfile->name = xstrdup(name);
 
 	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
-		if (errno != ENOENT)
-			warn("%s", nfile->name);
 		free(nfile->name);
 		free(nfile);
 		return (NULL);