Adding statsd handler.

Statsd handler.  I know there is already a graphite one but for we use it for logs that grow very quickly instead of handling overly large files, and also for very frequent updates as per normal statsd modus operandi.  We also don't point anything directly at graphite as we use statsd for some namespace sanity enforcement.  This works well for us.

Sample output with postfix:

statsd:8125 metric.postfix.numSent:18|g
statsd:8125 metric.postfix.pctSent:100|g
statsd:8125 metric.postfix.numDeferred:0|g
statsd:8125 metric.postfix.pctDeferred:0|g
statsd:8125 metric.postfix.numBounced:0|g
statsd:8125 metric.postfix.pctBounced:0|g
statsd:8125 metric.postfix.mailTxnsSec:0.382978723404|g
statsd:8125 metric.postfix.mailSentSec:0.382978723404|g
statsd:8125 metric.postfix.avgDelay:3.54444444444|g