[MINOR] config: report all supported options for the "bind" keyword

"mss", "name" and "id" were missing.
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 428d7b9..ace9931 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -1212,7 +1212,7 @@
 				continue;
 			}
 
-			Alert("parsing [%s:%d] : '%s' only supports the 'transparent' and 'interface' options.\n",
+			Alert("parsing [%s:%d] : '%s' only supports the 'transparent', 'name', 'id', 'mss' and 'interface' options.\n",
 			      file, linenum, args[0]);
 			err_code |= ERR_ALERT | ERR_FATAL;
 			goto out;