Ruby: support Ruby 2.1 threading model
Ruby: add test-unit gem to work around broken test/unit in Ruby 2.1 stdlib
New option: ssl_disabled_protocols
make SSL_CTX_ctrl available
Honor ssl_disable_protocols config option
Update to 2.4.12
Fix comment after #endif
shttpd: SSL_OP_NO_TLSv1_1/2 needs OPENSSL_VERSION_NUMBER >= 0x10001000L
Fix openwsman.gem creation to include raw SWIG files

SWIG includes its own C preprocessor, thus handling all the
  #if RUBY_VERSION
directives.

This commit drops the swig-generated files in favor of raw swig files.
This makes the resulting gem independant from the host creating the gem.