pgsql: Add CREATE/ALTER/DROP OPERATOR FAMILY commands, also COMMENT ON

Log Message:
-----------
Add CREATE/ALTER/DROP OPERATOR FAMILY commands, also COMMENT ON OPERATOR
FAMILY; and add FAMILY option to CREATE OPERATOR CLASS to allow adding a
class to a pre-existing family. Per previous discussion. Man, what a
tedious lot of cutting and pasting ...

Modified Files:
--------------
pgsql/doc/src/sgml/ref:
allfiles.sgml (r1.68 -> r1.69)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/allfiles.sgml.diff?r1=1.68&r2=1.69)
alter_opclass.sgml (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_opclass.sgml.diff?r1=1.7&r2=1.8)
comment.sgml (r1.33 -> r1.34)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/comment.sgml.diff?r1=1.33&r2=1.34)
create_opclass.sgml (r1.18 -> r1.19)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_opclass.sgml.diff?r1=1.18&r2=1.19)
drop_opclass.sgml (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/drop_opclass.sgml.diff?r1=1.10&r2=1.11)
pgsql/doc/src/sgml:
reference.sgml (r1.60 -> r1.61)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/reference.sgml.diff?r1=1.60&r2=1.61)
pgsql/src/backend/catalog:
aclchk.c (r1.134 -> r1.135)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/aclchk.c.diff?r1=1.134&r2=1.135)
pgsql/src/backend/commands:
alter.c (r1.21 -> r1.22)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/alter.c.diff?r1=1.21&r2=1.22)
comment.c (r1.94 -> r1.95)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/comment.c.diff?r1=1.94&r2=1.95)
opclasscmds.c (r1.52 -> r1.53)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/opclasscmds.c.diff?r1=1.52&r2=1.53)
pgsql/src/backend/nodes:
copyfuncs.c (r1.363 -> r1.364)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/copyfuncs.c.diff?r1=1.363&r2=1.364)
equalfuncs.c (r1.296 -> r1.297)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/equalfuncs.c.diff?r1=1.296&r2=1.297)
pgsql/src/backend/parser:
gram.y (r2.575 -> r2.576)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/gram.y.diff?r1=2.575&r2=2.576)
keywords.c (r1.182 -> r1.183)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/keywords.c.diff?r1=1.182&r2=1.183)
pgsql/src/backend/tcop:
utility.c (r1.270 -> r1.271)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/utility.c.diff?r1=1.270&r2=1.271)
pgsql/src/include/commands:
defrem.h (r1.79 -> r1.80)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/commands/defrem.h.diff?r1=1.79&r2=1.80)
pgsql/src/include/nodes:
nodes.h (r1.192 -> r1.193)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/nodes.h.diff?r1=1.192&r2=1.193)
parsenodes.h (r1.338 -> r1.339)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/parsenodes.h.diff?r1=1.338&r2=1.339)
pgsql/src/include/utils:
acl.h (r1.99 -> r1.100)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/acl.h.diff?r1=1.99&r2=1.100)

Added Files:
-----------
pgsql/doc/src/sgml/ref:
alter_opfamily.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_opfamily.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
create_opfamily.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_opfamily.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
drop_opfamily.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/drop_opfamily.sgml?rev=1.1&content-type=text/x-cvsweb-markup)