skip test if openssl is not available.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8576 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/net/http/test_https_proxy.rb

@@ -1,4 +1,7 @@
-require 'net/https'
+begin
+  require 'net/https'
+rescue LoadError
+end
 require 'test/unit'
 
 class HTTPSProxyTest < Test::Unit::TestCase
@@ -23,5 +26,5 @@ class HTTPSProxyTest < Test::Unit::TestCase
         "[ruby-dev:25673]")
     }
   end
-end
+end if defined?(OpenSSL)