This is a combined patch of the following two commits in maint:
a09d8c78dd30 test/test_ssl: suppress warning in test_alpn_protocol_selection_cancel
de965374ee85 test/test_pair: disable compression
This hopefully fixes the RubyCI gentoo failure:
http://rubyci.s3.amazonaws.com/gentoo/ruby-trunk/log/20170912T033004Z.fail.html.gz
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59857 b2dd03c8-39d4-4d8f-98ff-823fe69b080e