lua-socket-fixes: use sio_socketname() for socket:tostring().

include/sio.h

@@ -47,6 +47,7 @@ enum { SERVICE_NAME_MAXLEN = 32 };
 - (id) init: (int) fd in: (const char *) format, ...;
 @end
 
+const char *sio_socketname(int fd);
 int sio_socket(int domain, int type, int protocol);
 
 int sio_shutdown(int fd, int how);

src/lua/lua_socket.m

@@ -237,7 +237,7 @@ static int
 lbox_socket_tostring(struct lua_State *L)
 {
 	struct bio_socket *s = bio_checksocket(L, -1);
-	lua_pushfstring(L, "%d", s->coio.fd);
+	lua_pushstring(L, sio_socketname(s->coio.fd));
 	return 1;
 }
 

src/sio.m

@@ -38,7 +38,7 @@
 #include "say.h"
 
 /** Pretty print socket name and peer (for exceptions) */
-static const char *
+const char *
 sio_socketname(int fd)
 {
 	static __thread char name[2 * SERVICE_NAME_MAXLEN];