Fix comment typo

src/or/or.h

@@ -1009,7 +1009,7 @@ typedef struct connection_t {
   /* XXXX023 move this field, and all the listener-only fields (just
      socket_family, I think), into a new listener_connection_t subtype. */
   /** If the connection is a CONN_TYPE_AP_DNS_LISTENER, this field points
-   * to the evdns_server_port is uses to listen to and answer connections. */
+   * to the evdns_server_port it uses to listen to and answer connections. */
   struct evdns_server_port *dns_server_port;
 
   /** Unique ID for measuring tunneled network status requests. */