Thread: pgsql-server: Add mention of environment variable conflict with

Log Message:
-----------
Add mention of environment variable conflict with uncommenting config
file variables:

<   Another option is to allow commented values to return to their
<   default values.
>   This has to address environment variables that are then overridden
>   by config file values.  Another option is to allow commented values
>   to return to their default values.

Modified Files:
--------------
    pgsql-server/doc:
        TODO (r1.1338 -> r1.1339)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/TODO.diff?r1=1.1338&r2=1.1339)