Revert "lib/logstash/outputs/udp.rb: Optimization to make udp sending faster."

This reverts commit de8bdce5f25648ef404e19d13158256ff342333c.

I should have tested this in JRuby, and I didn't.  I suspect it's the cause
of various problems we're seeing with UDP sending being broken.
lib/logstash/version.rb: Version bump to mark PD bugfix.
Merge pull request #2 from PagerDuty/https-fixes+1.1.6-2

logstash with fixed UDP output; CR'd by James.