pgsql: Documentation for ALTER object SET SCHEMA commands.

Log Message:
-----------
Documentation for ALTER object SET SCHEMA commands.  Also some minor
editorialization.

Modified Files:
--------------
    pgsql/doc/src/sgml/ref:
        alter_aggregate.sgml (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_aggregate.sgml.diff?r1=1.5&r2=1.6)
        alter_domain.sgml (r1.16 -> r1.17)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_domain.sgml.diff?r1=1.16&r2=1.17)
        alter_function.sgml (r1.7 -> r1.8)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_function.sgml.diff?r1=1.7&r2=1.8)
        alter_sequence.sgml (r1.9 -> r1.10)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_sequence.sgml.diff?r1=1.9&r2=1.10)
        alter_table.sgml (r1.77 -> r1.78)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_table.sgml.diff?r1=1.77&r2=1.78)
        alter_type.sgml (r1.1 -> r1.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_type.sgml.diff?r1=1.1&r2=1.2)