* include/ruby/defines.h: ditto.

* configure.in: ditto.

* thread_pthread.c: ditto.

* io.c: ditto.

* lib/mkmf.rb: ditto.

* ext/socket/getaddrinfo.c: ditto.

* ext/socket/extconf.rb: ditto.

* ext/socket/socket.c: ditto.

* ext/socket/addrinfo.h: ditto.

* ext/socket/getnameinfo.c: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18402 b2dd03c8-39d4-4d8f-98ff-823fe69b080e