for GRANT/REVOKE is now just that, not "CHANGE".

On the way, migrate some of the aclitem internal representation away from
the parser and build a real parse tree instead.  Also add some 'const'
qualifiers.

privileges.  INSERT and COPY FROM now require INSERT (only).  Add
privileges regression test.

Fix misspelling of disbursion to dispersion.

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>.