between Postgres and PostgreSQL.

* Let unprivileged users change their own passwords.

* The password is now an Sconst in the parser, which better reflects its text datatype and also
forces users to quote them.

* If your password is NULL you won't be written to the password file, meaning you can't connect
until you have a password set up (if you use password authentication).

* When you drop a user that owns a database you get an error. The database is not gone.

 committed, but will be within a week or two).
Actually include the reference page into the docs...

ecpg reference page still needs formatting.

No big deal; fixed lots of other markup at the same time.
Bigest change: make sure there is no whitespace
 in front of <term> contents.
This will probably help the other output types too.

Split reference pages for CREATE TABLE AS and SELECT INTO to allow psgml
 (the emacs parser) to handle parsing.

 of Norm's Modular Style Sheets and jade/docbook.
From Vince Vielhaber <vev@michvhf.com>.

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