=begin
SSLv2 becomes disabled in much environment, because this has several vulnerabilities.
This patch disable SSLv2 in Ruby.
If user want to use SSLv2 in ruby, you need config with --enable-opensslv2.
The SSLv2 support is disable by default.
=begin
This issue was solved with changeset r31346.
Nobuhiro, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.
ext/openssl/extconf.rb: Should check SSLv2_*method.
openssl compiled with "no-ssl2" the extconf don't fail
when running `make' having this compilation errors.
Patched by Laurent Arnoud. fixes #4562, #4556
=end