Documentation: ALTER ROLE - no password

[Andreas 'ads' Scherbaum <adsmail(at)wars-nicht(dot)de>]

Hello,

i've seen the question "how to remove a password" now several times in
the last weeks. Attached is a small patch which add a new example for
the "ALTER ROLE" documentation.


Kind regards

-- 
				Andreas 'ads' Scherbaum
German PostgreSQL User Group

--- alter_role.sgml.orig	2007-09-03 20:46:29.000000000 +0200
+++ alter_role.sgml	2008-04-30 02:02:00.000000000 +0200
@@ -218,6 +218,14 @@
   </para>
 
   <para>
+   Remove a role's password:
+
+<programlisting>
+ALTER ROLE davide WITH PASSWORD NULL;
+</programlisting>
+  </para>
+
+  <para>
    Change a password expiration date, specifying that the password
    should expire at midday on 4th May 2015 using
    the time zone which is one hour ahead of <acronym>UTC</>: