retire _PROTOTYPE

. only good for obsolete K&R support
	. also remove a stray ansi.h and the proto cmd

lib/libdevman/generic.c

@@ -14,8 +14,7 @@
 
 PRIVATE endpoint_t devman_ep;
 
-FORWARD _PROTOTYPE( int save_string,
-                    (char *buffer, char *src, size_t *offset));
+FORWARD int save_string(char *buffer, char *src, size_t *offset);
 
 PRIVATE TAILQ_HEAD(devlist_head, devman_dev) dev_list;