Log Message:
-----------
doc/usage.txt improvements
Patch by Greg Sabino Mullane, applied with minor modifications.
Modified Files:
--------------
pgbouncer/doc:
usage.txt (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/usage.txt?r1=1.9&r2=1.10)