pgsql: Add INET/CIDR operators: and, or, not, plus int8, minus int8, and

Log Message:
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Add INET/CIDR operators: and, or, not, plus int8, minus int8, and inet
minus inet.

Stephen R. van den Berg

Modified Files:
--------------
pgsql/doc/src/sgml:
func.sgml (r1.303 -> r1.304)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml.diff?r1=1.303&r2=1.304)
pgsql/src/backend/utils/adt:
network.c (r1.63 -> r1.64)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/network.c.diff?r1=1.63&r2=1.64)
pgsql/src/include/catalog:
pg_operator.h (r1.138 -> r1.139)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_operator.h.diff?r1=1.138&r2=1.139)
pg_proc.h (r1.394 -> r1.395)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h.diff?r1=1.394&r2=1.395)
pgsql/src/include/utils:
builtins.h (r1.272 -> r1.273)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/builtins.h.diff?r1=1.272&r2=1.273)
pgsql/src/test/regress/expected:
inet.out (r1.19 -> r1.20)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/inet.out.diff?r1=1.19&r2=1.20)
pgsql/src/test/regress/sql:
inet.sql (r1.11 -> r1.12)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/inet.sql.diff?r1=1.11&r2=1.12)