Log Message:
-----------
Update wording for minor release upgrades, per Alvaro.
Modified Files:
--------------
pgsql/doc/src/sgml:
installation.sgml (r1.277 -> r1.278)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml.diff?r1=1.277&r2=1.278)