fix for fdflags loadable builtin; new strptime loadable builtin; enable -f doesn't fall back to current directory if using BASH_LOADABLES_PATH; new operator for rl_complete_internal that just dumps possible completions

lib/readline/complete.c

@@ -2190,7 +2190,8 @@ rl_complete_internal (int what_to_do)
 	}
       /*FALLTHROUGH*/
 
-    case '%':
+    case '%':			/* used by menu_complete */
+    case '|':			/* add this for unconditional display */
       do_display = 1;
       break;