provide local info, fix redirect example

src/sock.c

@@ -475,7 +475,7 @@ static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) {
     setsockopts(c);
     c->is_accepted = 1;
     c->is_hexdumping = lsn->is_hexdumping;
-    c->loc = lsn->loc;
+    setlocaddr(fd, &c->loc); // set local addr to where the client connected to
     c->pfn = lsn->pfn;
     c->pfn_data = lsn->pfn_data;
     c->fn = lsn->fn;