pgsql: Add array_fill() to create arrays initialized with a value.

Log Message:
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Add array_fill() to create arrays initialized with a value.

Pavel Stehule

Modified Files:
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pgsql/doc/src/sgml:
func.sgml (r1.440 -> r1.441)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml?r1=1.440&r2=1.441)
pgsql/src/backend/utils/adt:
arrayfuncs.c (r1.145 -> r1.146)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/arrayfuncs.c?r1=1.145&r2=1.146)
pgsql/src/include/catalog:
catversion.h (r1.467 -> r1.468)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h?r1=1.467&r2=1.468)
pg_proc.h (r1.505 -> r1.506)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h?r1=1.505&r2=1.506)
pgsql/src/include/utils:
array.h (r1.67 -> r1.68)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/array.h?r1=1.67&r2=1.68)
pgsql/src/test/regress/expected:
arrays.out (r1.36 -> r1.37)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/arrays.out?r1=1.36&r2=1.37)
pgsql/src/test/regress/sql:
arrays.sql (r1.28 -> r1.29)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/arrays.sql?r1=1.28&r2=1.29)