Very minor formatting fixup in the refentry id field to remove

 the trailing "-1". This makes a cleaner html output file name.
Clean up a few refpurpose fields.

doc/src/sgml/ref/alter_table.sgml

-<REFENTRY ID="SQL-ALTERTABLE-1">
+<REFENTRY ID="SQL-ALTERTABLE">
 <REFMETA>
 <REFENTRYTITLE>
 ALTER TABLE

doc/src/sgml/ref/alter_user.sgml

-  <REFENTRY ID="SQL-ALTERUSER-1">
+  <REFENTRY ID="SQL-ALTERUSER">
    <REFMETA>
     <REFENTRYTITLE>
      ALTER USER

doc/src/sgml/ref/begin.sgml

-<REFENTRY ID="SQL-BEGINWORK-1">
+<REFENTRY ID="SQL-BEGINWORK">
  <REFMETA>
   <REFENTRYTITLE>
    BEGIN WORK

doc/src/sgml/ref/close.sgml

-<REFENTRY ID="SQL-CLOSE-1">
+<REFENTRY ID="SQL-CLOSE">
  <REFMETA>
   <REFENTRYTITLE>
    CLOSE

doc/src/sgml/ref/cluster.sgml

-<REFENTRY ID="SQL-CLUSTER-1">
+<REFENTRY ID="SQL-CLUSTER">
  <REFMETA>
  <REFENTRYTITLE>
   CLUSTER
@@ -10,7 +10,7 @@
   CLUSTER
  </REFNAME>
  <REFPURPOSE>
-  Gives storage clustering advice to PostgreSQL
+  Gives storage clustering advice to the backend
  </REFPURPOSE>
  
  <REFSYNOPSISDIV>

doc/src/sgml/ref/commit.sgml

-<REFENTRY ID="SQL-COMMIT-1">
+<REFENTRY ID="SQL-COMMIT">
  <REFMETA>
   <REFENTRYTITLE>
    COMMIT

doc/src/sgml/ref/copy.sgml

-<REFENTRY ID="SQL-COPY-1">
+<REFENTRY ID="SQL-COPY">
  <REFMETA>
   <REFENTRYTITLE>
    COPY

doc/src/sgml/ref/create_aggregate.sgml

-<REFENTRY ID="SQL-CREATEAGGREGATE-1">
+<REFENTRY ID="SQL-CREATEAGGREGATE">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE AGGREGATE

doc/src/sgml/ref/create_database.sgml

-<REFENTRY ID="SQL-CREATEDATABASE-1">
+<REFENTRY ID="SQL-CREATEDATABASE">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE DATABASE

doc/src/sgml/ref/create_function.sgml

-<REFENTRY ID="SQL-CREATEFUNCTION-1">
+<REFENTRY ID="SQL-CREATEFUNCTION">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE FUNCTION

doc/src/sgml/ref/create_index.sgml

-<REFENTRY ID="SQL-CREATEINDEX-1">
+<REFENTRY ID="SQL-CREATEINDEX">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE INDEX

doc/src/sgml/ref/create_language.sgml

-<REFENTRY ID="SQL-CREATELANGUAGE-1">
+<REFENTRY ID="SQL-CREATELANGUAGE">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE LANGUAGE

doc/src/sgml/ref/create_operator.sgml

-<REFENTRY ID="SQL-CREATEOPERATOR-1">
+<REFENTRY ID="SQL-CREATEOPERATOR">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE OPERATOR

doc/src/sgml/ref/create_rule.sgml

-<REFENTRY ID="SQL-CREATERULE-1">
+<REFENTRY ID="SQL-CREATERULE">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE RULE

doc/src/sgml/ref/create_sequence.sgml

-<REFENTRY ID="SQL-CREATESEQUENCE-1">
+<REFENTRY ID="SQL-CREATESEQUENCE">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE SEQUENCE

doc/src/sgml/ref/create_table.sgml

-<REFENTRY ID="SQL-CREATETABLE-1">
+<REFENTRY ID="SQL-CREATETABLE">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE TABLE

doc/src/sgml/ref/create_trigger.sgml

-<REFENTRY ID="SQL-CREATETRIGGER-1">
+<REFENTRY ID="SQL-CREATETRIGGER">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE TRIGGER

doc/src/sgml/ref/create_type.sgml

-<REFENTRY ID="SQL-CREATETYPE-1">
+<REFENTRY ID="SQL-CREATETYPE">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE TYPE

doc/src/sgml/ref/create_user.sgml

-<REFENTRY ID="SQL-CREATEUSER-1">
+<REFENTRY ID="SQL-CREATEUSER">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE USER
@@ -318,4 +318,4 @@ sgml-exposed-tags:nil
 sgml-local-catalogs:"/usr/lib/sgml/catalog"
 sgml-local-ecat-files:nil
 End:
--->
+-->
\ No newline at end of file

doc/src/sgml/ref/create_view.sgml

-<REFENTRY ID="SQL-CREATEVIEW-1">
+<REFENTRY ID="SQL-CREATEVIEW">
  <REFMETA>
   <REFENTRYTITLE>
    CREATE VIEW
@@ -282,4 +282,4 @@ sgml-exposed-tags:nil
 sgml-local-catalogs:"/usr/lib/sgml/catalog"
 sgml-local-ecat-files:nil
 End:
--->
+-->
\ No newline at end of file