xmlrpc: Fix typos in module documentation

src/modules/xmlrpc/doc/xmlrpc.xml

@@ -684,7 +684,7 @@ Content-Length: 276
 		(avoid trying to open tcp connection to xmlrpc clients that closed it).
 		Alternatively ending the XMLRPC route with return -1, exit -1 or
 		drop -1 can also be used, but note that this will not work for
-		async rpcs (it will close the connection immeidately and not on the
+		async rpcs (it will close the connection immediately and not on the
 		async response).
 		<example>
 		<programlisting>