add -fvisibility=hidden to CC flags, mark XXX_main functions
EXTERNALLY_VISIBLE. 5% size reduction of libbusybox.so

diff --git a/networking/inetd.c b/networking/inetd.c
index 6d72e13..9ea7f9c 100644
--- a/networking/inetd.c
+++ b/networking/inetd.c
@@ -1303,7 +1303,7 @@
 #endif
 
 
-int inetd_main(int argc, char **argv);
+int inetd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int inetd_main(int argc, char **argv)
 {
 	servtab_t *sep;