Move prototype for bindresvport(3) to <netiniet/in.h> as it is

not rpc-specific and other stuff uses it now.

src/include/rpc/rpc.h

@@ -88,7 +88,6 @@ extern struct rpcent *getrpcent		__P((void));
 extern void setrpcent __P((int));
 extern void endrpcent __P((void));
 
-extern int bindresvport __P((int, struct sockaddr_in *));
 extern int get_myaddress __P((struct sockaddr_in *));
 
 __END_DECLS