pgsql: Remove the arbitrary (and undocumented) limit on the number of

Log Message:
-----------
Remove the arbitrary (and undocumented) limit on the number of parameter=value
pairs that can be handled by xslt_process().

There is much else to do here, but this patch seems useful in its own right
for as long as this code survives.

Pavel Stehule, reviewed by Mike Fowler

Modified Files:
--------------
pgsql/contrib/xml2:
xslt_proc.c (r1.21 -> r1.22)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/xml2/xslt_proc.c?r1=1.21&r2=1.22)
pgsql/contrib/xml2/expected:
xml2.out (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/xml2/expected/xml2.out?r1=1.1&r2=1.2)
xml2_1.out (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/xml2/expected/xml2_1.out?r1=1.1&r2=1.2)
pgsql/contrib/xml2/sql:
xml2.sql (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/xml2/sql/xml2.sql?r1=1.1&r2=1.2)