Log Message:
-----------
Use a 'datallowconn' check for avoiding 'template0', rather than
hardcoding a 'template0' check, per suggestion from Alvaro.
This might fix a problem where someone has allowed 'template0'
connections, but it is a cleaner approach even if doesn't fix the
bug.
Modified Files:
--------------
pgsql/contrib/pg_upgrade:
pg_upgrade.c (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/pg_upgrade.c?r1=1.2&r2=1.3)