pgsql: Fix assorted typos in the documentation, and use American

Log Message:
-----------
Fix assorted typos in the documentation, and use American spelling
rather than British. Patch from Michael Fuhr.

Modified Files:
--------------
pgsql/doc/src/sgml:
config.sgml (r1.30 -> r1.31)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/config.sgml.diff?r1=1.30&r2=1.31)
information_schema.sgml (r1.21 -> r1.22)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/information_schema.sgml.diff?r1=1.21&r2=1.22)
planstats.sgml (r1.3 -> r1.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/planstats.sgml.diff?r1=1.3&r2=1.4)
release.sgml (r1.390 -> r1.391)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release.sgml.diff?r1=1.390&r2=1.391)
rules.sgml (r1.42 -> r1.43)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/rules.sgml.diff?r1=1.42&r2=1.43)
runtime.sgml (r1.353 -> r1.354)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/runtime.sgml.diff?r1=1.353&r2=1.354)
user-manag.sgml (r1.31 -> r1.32)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/user-manag.sgml.diff?r1=1.31&r2=1.32)
xfunc.sgml (r1.106 -> r1.107)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xfunc.sgml.diff?r1=1.106&r2=1.107)
pgsql/doc/src/sgml/ref:
alter_sequence.sgml (r1.11 -> r1.12)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_sequence.sgml.diff?r1=1.11&r2=1.12)
copy.sgml (r1.69 -> r1.70)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/copy.sgml.diff?r1=1.69&r2=1.70)
create_table_as.sgml (r1.29 -> r1.30)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_table_as.sgml.diff?r1=1.29&r2=1.30)
pg_dumpall.sgml (r1.53 -> r1.54)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/pg_dumpall.sgml.diff?r1=1.53&r2=1.54)