rest-client/rest-client — pull request #324 by ab (2014-11-03 02:34:37+00:00)
Title: Add a more descriptive rest-client user agent.

Identify ourselves as rest-client and also include system architecture and
ruby / ruby engine version information.

For example:

User-Agent: rest-client/1.7.2 (linux-gnu x86_64) ruby/1.9.3p550

User-Agent: rest-client/1.7.2 (linux x86_64) jruby/1.7.9 (1.9.3p392)