Log Message:
Update thin to 1.6.2.

== 1.6.2 Doc Brown
 * No longer replace response's body on HEAD request. Ensuring body.close will \ 
be called.
 * Remove `---ssl-verify` option as EventMachine doesn't verify the certificate.
 * Fix env['rack.peer_cert'] to return SSL certifcate.

== 1.6.1 Death Proof
 * Regression: Default logger to STDOUT when using outside of CLI.
 * Regression: Downgrade Rack required version back to 1.0 to work w/ prior \ 
Rails versions.

== 1.6.0 Greek Yogurt
 * Accept absolute URL in request line, eg.: 'GET http://site.com/he/lo HTTP/1.1'.
 * HEAD request no longer return a body in the response.
 * No longer stop EventMachine's reactor loop unless it was started by Thin.
 * Make request env keys upcasing locale-agnostic.
 * Use Ruby's `Logger` for logging. [Akshay Moghe].
   The logger can now be set using `Thin::Logging.logger=`.
   Tracing of request is handled by a second logger, `Thin::Logging.trace_logger=`.
 * Add --threadpool-size option to configure EM's thread pool size (default: 20).
 * Pipelining is no longer supported.