Make minor info and markup changes for v6.5 release.

Fix markup.

SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
                                ^^^^ required

Also note that SET TRANSACTION ISOLATION LEVEL change
isolevel for _current_ transaction, in accordance with
standard, not for session (ALTER SESSION is used in Oracle,
but it's not implemented currently).

And I would don't mention SET XACTISOLEVEL TO ...
form at all.

Please update set.sgml - I failed to understand all these

SET TIME ZONE { '<REPLACEABLE CLASS="PARAMETER">

now.


for Vadim

should be described like SET TIME ZONE: TO is not allowed, as well
as DEFAULT option. There are only two forms:

for Vadim.

Add timing info for v6.5 on my linux box.

Clean out duplicate stuff in odbc.sgml resulting from a faulty patch.

Multiple intros cause trouble since they have some section elements
 (e.g. "y2k.sgml") in common leading to duplicate labels.
Include emacs formatting hints in the intro*.sgml sources.

new -x option to skip acl dump.

Update for v6.5 release.

Add an appendix with more details on date/time attributes and handling.
Update most references to Postgres version numbers to 6.5,
 *except* for the porting list which will require a report
 from a successful installation to be updated.

Some wording changes from Vadim's original text doc.
Processes cleanly, but may need fixup.