had single positional argument for loglevel,
switched to named args which inherits the more flexible loglevel
shortened logging line
before: connection_time: Connection time from 66.118.151.187: 3.046 sec.
after: connection_time: 3.046 s.
import plugins/connection_time from SVN's contrib. Changes:
* perltidy run
* add one optional parameter: log level of the message, defaults
to LOGNOTICE (same as in SVN)