networking/interface.c: huke remaining big statics; use malloc for INET[6]_rresolve

return value. Went thru callers and adjusted them - code got smaller too.

function                                             old     new   delta
ip_port_str                                            -     126    +126
INET6_rresolve                                       165     182     +17
static.cache                                          20      24      +4
route_main                                          2092    2091      -1
INET_sprint                                           61      59      -2
INET_nn                                                4       -      -4
INET6_sprint                                          59      53      -6
udp_do_one                                           518     508     -10
tcp_do_one                                           433     423     -10
raw_do_one                                           494     484     -10
traceroute_main                                     4117    4105     -12
INET_rresolve                                        334     321     -13
bb_displayroutes                                     494     456     -38
snprint_ip_port                                      244       -    -244
static.buff                                          264      16    -248
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 2/10 up/down: 147/-598)        Total: -451 bytes

size busybox_old busybox_unstripped
   text    data     bss     dec     hex filename
 751073    3048   14688  768809   bbb29 busybox_old
 750873    3048   14440  768361   bb969 busybox_unstripped

1 files changed, 4 insertions, 4 deletions

diff --git a/include/inet_common.h b/include/inet_common.h
index fa48fdf..eb4cb73 100644
--- a/include/inet_common.h
+++ b/include/inet_common.h
@@ -18,9 +18,9 @@ int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst);
  *          & 0x4000: host instead of net,
  *          & 0x0fff: don't resolve
  */
-int INET_rresolve(char *name, size_t len, struct sockaddr_in *s_in,
-	int numeric, unsigned int netmask);
-
 
 int INET6_resolve(const char *name, struct sockaddr_in6 *sin6);
-int INET6_rresolve(char *name, size_t len, struct sockaddr_in6 *sin6, int numeric);
+
+/* These return malloced string */
+char *INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t netmask);
+char *INET6_rresolve(struct sockaddr_in6 *sin6, int numeric);