Log Message:
-----------
Fail in a nicer way if we have --with-perl and no Perl.
Modified Files:
--------------
pgsql:
configure (r1.667 -> r1.668)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.667&r2=1.668)
configure.in (r1.619 -> r1.620)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.619&r2=1.620)