Log Message:
Update ruby-puma to 2.11.3.

=== 2.11.3 / 2015-05-18

* 5 bug fixes:
  * Be sure to unlink tempfiles after a request. Fixes #690
  * Coerce the key to a string before checking. (thar be symbols). Fixes #684
  * Fix hang on bad SSL handshake
  * Remove `enable_SSLv3` support from JRuby

* 1 PR merged:
  * Merge pull request #698 from looker/hang-handshake

=== 2.11.2 / 2015-04-11

* 2 minor features:
  * Add `on_worker_fork` hook, which allows to mimic Unicorn's behavior
  * Add shutdown_debug config option

* 4 bug fixes:
  * Fix the Config constants not being available in the DSL. Fixes #683
  * Ignore multiple port declarations
  * Proper 'Connection' header handling compatible with HTTP 1.[01] protocols
  * Use "Puma" instead of "puma" to reporting to New Relic

* 1 doc fixes:
  * Add Gitter badge.

* 6 PRs merged:
  * Merge pull request #657 from schneems/schneems/puma-once-port
  * Merge pull request #658 from Tomohiro/newrelic-dispatcher-default-update
  * Merge pull request #662 from basecrm/connection-compatibility
  * Merge pull request #664 from fxposter/on-worker-fork
  * Merge pull request #667 from JuanitoFatas/doc/gemspec
  * Merge pull request #672 from chulkilee/refactor