Log Message:
-----------
Add WAL entry about compression.
Modified Files:
--------------
pgsql/doc/TODO.detail:
wal (r1.2 -> r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.detail/wal.diff?r1=1.2&r2=1.3)
pgsql/doc/src/FAQ:
TODO.html (r1.3 -> r1.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.3&r2=1.4)