pgsql: Update FAQ's in 8.0.X branch.

Log Message:
-----------
Update FAQ's in 8.0.X branch. (very small changes)

Tags:
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REL8_0_STABLE

Modified Files:
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pgsql/doc:
FAQ (r1.292.4.14 -> r1.292.4.15)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/FAQ.diff?r1=1.292.4.14&r2=1.292.4.15)
FAQ_AIX (r1.11.8.3 -> r1.11.8.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/FAQ_AIX.diff?r1=1.11.8.3&r2=1.11.8.4)
pgsql/doc/src/FAQ:
FAQ.html (r1.248.4.15 -> r1.248.4.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/FAQ.html.diff?r1=1.248.4.15&r2=1.248.4.16)