* test/openssl/test_ssl_session.rb (test_ctx_client_session_cb): Don't
  ignore errors of SSL accept.
  (test_ctx_server_session_cb): Ditto.

* test/openssl/utils.rb (server_loop): Add ignore_ssl_accept_error
  argument.
  (start_server): Refine threads waits.

* test/ruby/envutil.rb (assert_join_threads): Show a thread before
  backtrace.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48225 b2dd03c8-39d4-4d8f-98ff-823fe69b080e