pgbouncer - pgbouncer: revert back to old doc names

Log Message:
-----------
revert back to old doc names

Modified Files:
--------------
    pgbouncer/doc:
        Makefile (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/Makefile.diff?r1=1.5&r2=1.6)
        config.txt (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/config.txt.diff?r1=1.2&r2=1.3)
        pgbouncer.1 (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/pgbouncer.1.diff?r1=1.2&r2=1.3)
        pgbouncer.5 (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/pgbouncer.5.diff?r1=1.2&r2=1.3)
        usage.txt (r1.1.1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/usage.txt.diff?r1=1.1.1.1&r2=1.2)

Removed Files:
-------------
    pgbouncer/doc:
        pgbouncer.cmdline.txt
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/pgbouncer.cmdline.txt)
        pgbouncer.config.txt
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/pgbouncer.config.txt)