Fix omissions in documentation of the pg_roles view.

Somehow, column rolconfig got removed from the documentation of the
pg_roles view in the 9.0 cycle, although the column is actually still
there.  In 9.1, we'd also forgotten to document the rolreplication column.
Spotted by Sakamoto Masahiko.

doc/src/sgml/catalogs.sgml

@@ -1263,7 +1263,7 @@
       <entry><type>bool</type></entry>
       <entry>
        Role can log in. That is, this role can be given as the initial
-       session authorization identifier.
+       session authorization identifier
       </entry>
      </row>
 
@@ -1274,7 +1274,7 @@
        Role is a replication role. That is, this role can initiate streaming
        replication (see <xref linkend="streaming-replication">) and set/unset
        the system backup mode using <function>pg_start_backup</> and
-       <function>pg_stop_backup</>.
+       <function>pg_stop_backup</>
       </entry>
      </row>
 
@@ -7370,7 +7370,7 @@
       <entry></entry>
       <entry>
        Role can update system catalogs directly.  (Even a superuser cannot do
-       this unless this column is true.)
+       this unless this column is true)
       </entry>
      </row>
 
@@ -7384,6 +7384,18 @@
       </entry>
      </row>
 
+     <row>
+      <entry><structfield>rolreplication</structfield></entry>
+      <entry><type>bool</type></entry>
+      <entry></entry>
+      <entry>
+       Role is a replication role. That is, this role can initiate streaming
+       replication (see <xref linkend="streaming-replication">) and set/unset
+       the system backup mode using <function>pg_start_backup</> and
+       <function>pg_stop_backup</>
+      </entry>
+     </row>
+
      <row>
       <entry><structfield>rolconnlimit</structfield></entry>
       <entry><type>int4</type></entry>
@@ -7409,6 +7421,13 @@
        null if no expiration</entry>
      </row>
 
+     <row>
+      <entry><structfield>rolconfig</structfield></entry>
+      <entry><type>text[]</type></entry>
+      <entry></entry>
+      <entry>Role-specific defaults for run-time configuration variables</entry>
+     </row>
+
      <row>
       <entry><structfield>oid</structfield></entry>
       <entry><type>oid</type></entry>