User Quota Implementation

All,

Out of necessity, I've implemented user quotas in 7.4.3.  What would the 
process be for having this reviewed and combined?  I have a patch for 
7.4.3 ready, but wanted to know if you suggest that I patch the latest 
cvs instead.  Below if some information on the implementation.

=======================================================================
-- FACTS --------------------------------------------------------------
=======================================================================

1. Only a superuser can modify user quotas.
2. The minimum quota size is 1K.
3. The maximum quota size is (currently) the maximum of int4*1024 bytes.
4. Altering a user's quota does not make a change to their current data.
5. If you modify a user's quota to smaller than their current amount, 
they will be unable to add any more data... but their current schema is 
not truncated.

=======================================================================
-- SQL CHANGES --------------------------------------------------------
=======================================================================
    COMMAND: ALTER USER
    *** NEW SYNTAX ***
        ALTER USER name [ [ WITH ] option [ ... ] ]
        where option can be:
            [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password'            | CREATEDB | NOCREATEDB            | CREATEUSER
|NOCREATEUSER            | VALID UNTIL 'abstime'            | QUOTA file_size | NOQUOTA
 
        where file_size is:
            integer[K | M | G]
            K = Kilobytes            M = Megabytes            G = Gigabytes

=======================================================================
-- USAGE EXAMPLES -----------------------------------------------------
=======================================================================
    *** VARIATIONS OF QUOTA SIZES ***    ALTER USER someuser QUOTA 50M;    ALTER USER someuser QUOTA 1G;    ALTER USER
someuserQUOTA 500K;
 
    *** GIVE USER AN UNLIMITED QUOTA ***    ALTER USER someuser NOQUOTA;

=======================================================================
-- INTERNAL CHANGES ---------------------------------------------------
=======================================================================

pg_shadow has added attribute userquota of type int4
pg_user view has added attribute (pg_shadow.userquota) to selection.

ADDED KEYWORDS
    QUOTA    NOQUOTA


-- 
Jonah H. Harris, UNIX Administrator  | phone: 505.224.4814
Albuquerque TVI                      | fax:   505.224.3014
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"All great truths begin as blasphemies."                --  George Bernard Shaw