(struct getaddrinfo_arg): defined.
(nogvl_getaddrinfo): defined.
(rb_getnameinfo): defined for name lookup without GVL.
(getnameinfo_arg): defined.
(nogvl_getnameinfo): defined.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21319 b2dd03c8-39d4-4d8f-98ff-823fe69b080e