move vhost_should_log call to server.c

log.o is linked to some regress/ stuff.  Calling from there a vhost_*
function means that we should link the regress/stuff to server.o too
(and that would pull in other stuff...).  Moving the call is easier,
and also probably better.

log.c

@@ -188,9 +188,6 @@ log_request(struct client *c, char *meta, size_t l)
 	size_t len;
 	int ec;
 
-	if (vhost_disable_log(c->host, c->iri.path))
-		return;
-
 	len = sizeof(c->addr);
 	ec = getnameinfo((struct sockaddr*)&c->addr, len,
 	    hbuf, sizeof(hbuf),

server.c

@@ -620,7 +620,8 @@ handle_start_reply(int fd, short ev, void *d)
 		return;
 	}
 
-	log_request(c, buf, sizeof(buf));
+	if (!vhost_disable_log(c->host, c->iri.path))
+		log_request(c, buf, sizeof(buf));
 
 	if (c->code != SUCCESS)
 		close_conn(fd, ev, c);