merge revision(s) 55797: [Backport #12645]
* ext/socket/option.c, ext/socket/rubysocket.h (inet_ntop): share the fallback definition. [ruby-core:76646] [Bug #12645]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@55926 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 55797: [Backport #12645]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@55926 b2dd03c8-39d4-4d8f-98ff-823fe69b080e