ext/digest/md5/md5.c, ext/openssl/ossl.c (main),
ext/socket/extconf.rb (ipv6, wide-getaddrinfo): main should be int.
* main.c (main), win32/winmain.c, wince/wincemain.c (WinMain): envp is
no longer used so long time. based on a patch from Peter Bowen at
[ruby-core:18208]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e