Log Message:
-----------
Add FAQ entry to mention using COALESCE() for concatenation of possible
NULLs.
Modified Files:
--------------
pgsql/doc:
FAQ (r1.404 -> r1.405)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/FAQ.diff?r1=1.404&r2=1.405)
pgsql/doc/src/FAQ:
FAQ.html (r1.360 -> r1.361)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/FAQ.html.diff?r1=1.360&r2=1.361)