This revamps and simplifies the ruby template. ruby now subsumes ruby-rdoc, ruby-irb and ruby-gems. ruby-ri stays separate because of size, but has an exact dependency. Added patches for LibreSSL (removal of RAND_egd) and libffi detection.
--HG-- extra : convert_revision : f41e9acdc3a87e08289b246f40dd63f0952ae070