pgsql: Fix a bunch of bad grammar in the docs: "<link>, which see for

Log Message:
-----------
Fix a bunch of bad grammar in the docs: "<link>, which see for more
information" is un-good English.

Tags:
----
REL8_2_STABLE

Modified Files:
--------------
pgsql/doc/src/sgml:
ddl.sgml (r1.69.2.1 -> r1.69.2.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ddl.sgml.diff?r1=1.69.2.1&r2=1.69.2.2)
pgsql/doc/src/sgml/ref:
alter_role.sgml (r1.7 -> r1.7.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_role.sgml.diff?r1=1.7&r2=1.7.2.1)
alter_user.sgml (r1.42 -> r1.42.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_user.sgml.diff?r1=1.42&r2=1.42.2.1)
begin.sgml (r1.34 -> r1.34.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/begin.sgml.diff?r1=1.34&r2=1.34.2.1)
create_group.sgml (r1.17 -> r1.17.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_group.sgml.diff?r1=1.17&r2=1.17.2.1)
create_user.sgml (r1.39 -> r1.39.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_user.sgml.diff?r1=1.39&r2=1.39.2.1)
createlang.sgml (r1.38.2.2 -> r1.38.2.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/createlang.sgml.diff?r1=1.38.2.2&r2=1.38.2.3)
drop_group.sgml (r1.13 -> r1.13.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/drop_group.sgml.diff?r1=1.13&r2=1.13.2.1)
drop_user.sgml (r1.23 -> r1.23.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/drop_user.sgml.diff?r1=1.23&r2=1.23.2.1)