pgsql-server: The added aggregates are: (1) boolean-and and boolean-or

Log Message:
-----------
The added aggregates are:

(1) boolean-and and boolean-or aggregates named bool_and and bool_or.
they (SHOULD;-) correspond to standard sql every and some/any aggregates.
they do not have the right name as there is a problem with
the standard and the parser for some/any. Tom also think that
the standard name is misleading because NULL are ignored.
Also add 'every' aggregate.

(2) bitwise integer aggregates named bit_and and bit_or for
int2, int4, int8 and bit types. They are not standard, but I find
them useful. I needed them once.

The patches adds:

- 2 new very short strict functions for boolean aggregates in
src/backed/utils/adt/bool.c,
src/include/utils/builtins.h and src/include/catalog/pg_proc.h

- the new aggregates declared in src/include/catalog/pg_proc.h and
src/include/catalog/pg_aggregate.h

- some documentation and validation about these new aggregates.

Fabien COELHO

Modified Files:
--------------
pgsql-server/doc/src/sgml:
func.sgml (r1.203 -> r1.204)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/src/sgml/func.sgml.diff?r1=1.203&r2=1.204)
pgsql-server/src/backend/utils/adt:
bool.c (r1.32 -> r1.33)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/utils/adt/bool.c.diff?r1=1.32&r2=1.33)
pgsql-server/src/include/catalog:
catversion.h (r1.230 -> r1.231)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/catalog/catversion.h.diff?r1=1.230&r2=1.231)
pg_aggregate.h (r1.42 -> r1.43)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/catalog/pg_aggregate.h.diff?r1=1.42&r2=1.43)
pg_proc.h (r1.329 -> r1.330)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/catalog/pg_proc.h.diff?r1=1.329&r2=1.330)
pgsql-server/src/include/utils:
builtins.h (r1.238 -> r1.239)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/utils/builtins.h.diff?r1=1.238&r2=1.239)
pgsql-server/src/test/regress/expected:
aggregates.out (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/test/regress/expected/aggregates.out.diff?r1=1.10&r2=1.11)
pgsql-server/src/test/regress/sql:
aggregates.sql (r1.8 -> r1.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/test/regress/sql/aggregates.sql.diff?r1=1.8&r2=1.9)