doc: Add default value of createrole_self_grant

Document that the default value for createrole_self_grant is an empty
string which in turn disable the feature.

Author: Shi Yu 
Discussion: https://postgr.es/m/OSZPR01MB63105D0D96A9A72A7FCD4FFEFDA09@OSZPR01MB6310.jpnprd01.prod.outlook.com

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index ecd9aa73ef7665e3907a05ef36b741885c1fd22b..e5c41cc6c6d61c63b2da572bf13056b15015f66e 100644 (file)
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -9499,7 +9499,8 @@ SET XML OPTION { DOCUMENT | CONTENT };
         is set to a non-empty value, the newly-created role will be granted
         to the creating user with the options specified. The value must be
         set, inherit, or a
-        comma-separated list of these.
+        comma-separated list of these. The default value is an empty string,
+        which disables the feature.
        
        
         The purpose of this option is to allow a CREATEROLE