nc: remove a bit of bloat
inetd: more NOMMU fixes
rx: shrink
devfsd: minor shrink
vlock: shrink
tcpudp: narrow down window where we have no wildcard socket

parse_one_line                                      1015    1102     +87
init_ring                                              -      53     +53
xzalloc_lsa                                            -      48     +48
read_byte                                             51      50      -1
rearm_alarm                                           28      25      -3
nc_main                                             1028    1000     -28
initring                                              53       -     -53
vlock_main                                           583     496     -87
reread_config_file                                  1089     991     -98
rx_main                                             1046     912    -134
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 1/6 up/down: 188/-404)         Total: -216 bytes
   text    data     bss     dec     hex filename
 800120     661    7428  808209   c5511 busybox_old
 799796     661    7428  807885   c53cd busybox_unstripped

diff --git a/networking/nc_bloaty.c b/networking/nc_bloaty.c
index 2ee833e..ce48295 100644
--- a/networking/nc_bloaty.c
+++ b/networking/nc_bloaty.c
@@ -751,6 +751,11 @@
 	if (option_mask32 & OPT_s) { /* local address */
 		/* if o_lport is still 0, then we will use random port */
 		ouraddr = xhost2sockaddr(str_s, o_lport);
+#ifdef BLOAT
+		/* prevent spurious "UDP listen needs !0 port" */
+		o_lport = get_nport(ouraddr);
+		o_lport = ntohs(o_lport);
+#endif
 		x = xsocket(ouraddr->u.sa.sa_family, x, 0);
 	} else {
 		/* We try IPv6, then IPv4, unless addr family is
@@ -771,12 +776,14 @@
 	setsockopt(netfd, SOL_SOCKET, SO_SNDBUF, &o_sndbuf, sizeof o_sndbuf);
 #endif
 
+#ifdef BLOAT
 	if (OPT_l && (option_mask32 & (OPT_u|OPT_l)) == (OPT_u|OPT_l)) {
 		/* apparently UDP can listen ON "port 0",
 		 but that's not useful */
 		if (!o_lport)
 			bb_error_msg_and_die("UDP listen needs nonzero -p port");
 	}
+#endif
 
 	FD_SET(0, &ding1);                        /* stdin *is* initially open */
 	if (proggie) {