pgsql: Add copyrights to pg_upgrade and pg_upgrade_tools files, per Tom.

Log Message:
-----------
Add copyrights to pg_upgrade and pg_upgrade_tools files, per Tom.

Modified Files:
--------------
    pgsql/contrib/pg_upgrade:
        check.c (r1.8 -> r1.9)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/check.c?r1=1.8&r2=1.9)
        controldata.c (r1.6 -> r1.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/controldata.c?r1=1.6&r2=1.7)
        dump.c (r1.4 -> r1.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/dump.c?r1=1.4&r2=1.5)
        exec.c (r1.5 -> r1.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/exec.c?r1=1.5&r2=1.6)
        file.c (r1.10 -> r1.11)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/file.c?r1=1.10&r2=1.11)
        function.c (r1.4 -> r1.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/function.c?r1=1.4&r2=1.5)
        info.c (r1.8 -> r1.9)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/info.c?r1=1.8&r2=1.9)
        option.c (r1.9 -> r1.10)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/option.c?r1=1.9&r2=1.10)
        page.c (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/page.c?r1=1.3&r2=1.4)
        pg_upgrade.c (r1.7 -> r1.8)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/pg_upgrade.c?r1=1.7&r2=1.8)
        pg_upgrade.h (r1.12 -> r1.13)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/pg_upgrade.h?r1=1.12&r2=1.13)
        relfilenode.c (r1.5 -> r1.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/relfilenode.c?r1=1.5&r2=1.6)
        server.c (r1.5 -> r1.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/server.c?r1=1.5&r2=1.6)
        tablespace.c (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/tablespace.c?r1=1.3&r2=1.4)
        util.c (r1.2 -> r1.3)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/util.c?r1=1.2&r2=1.3)
        version.c (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/version.c?r1=1.3&r2=1.4)
        version_old_8_3.c (r1.4 -> r1.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/version_old_8_3.c?r1=1.4&r2=1.5)
    pgsql/contrib/pg_upgrade_support:
        pg_upgrade_support.c (r1.2 -> r1.3)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade_support/pg_upgrade_support.c?r1=1.2&r2=1.3)