Log Message:
-----------
usage.txt: Time units are microseconds, not milliseconds
Modified Files:
--------------
pgbouncer/doc:
usage.txt (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/usage.txt?r1=1.7&r2=1.8)