pgsql: Batch of TODO updates, mostly completed item marking and

Log Message:
-----------
Batch of TODO updates, mostly completed item marking and whitespace
fixes. Not sure how these weren't comitted before.

Modified Files:
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pgsql/doc/src/FAQ:
TODO.html (r1.714 -> r1.715)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html?r1=1.714&r2=1.715)