merge revision(s) 55731: [Backport #12610]
* lib/webrick/httpservlet/cgihandler.rb (do_GET): delete HTTP_PROXY * test/webrick/test_cgi.rb (test_cgi_env): new test * test/webrick/webrick.cgi (do_GET): new endpoint to dump env [ruby-core:76511] [Bug #12610]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@55923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 55731: [Backport #12610]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@55923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e