https://bugs.gentoo.org/488158

taken from Fedora

Patch by Thomas Swan <thomas.swan@gmail.com>

--- a/xinetd/builtins.c
+++ b/xinetd/builtins.c
@@ -695,7 +695,7 @@ static void tcpmux_handler( const struct server *serp )
    if( SC_IS_INTERNAL( scp ) ) {
       SC_INTERNAL(scp, nserp);
    } else {
-      exec_server(nserp);
+      child_process(nserp);
    }
 }
 
