Log Message:-----------doc/config.txt improvements
Patch by Greg Sabino Mullane, applied with minor modifications.
Modified Files:-------------- pgbouncer/doc: config.txt (r1.20 -> r1.21) (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/config.txt?r1=1.20&r2=1.21)
