Ruby

merge revision(s) 26636:26638:
* lib/resolv.rb: fix [ruby-core:28144] reported by Hans de Graaff.
(Resolv::DNS#make_requester): pass nameserver_port to
UnconnectedUDP.new.
(Resolv::DNS.bind_random_port): change the is_ipv6 argument to
bind_host.
(Resolv::DNS::Requester#initialize): change instance variable to
store multiple sockets.
(Resolv::DNS::Requester#request): pass readable sockets to
recv_reply.
(Resolv::DNS::Requester#close): close all sockets.
(Resolv::DNS::Requester::UnconnectedUDP#initialize): allocate
a socket for each address family of name servers.
(Resolv::DNS::Requester::UnconnectedUDP#recv_reply): read from the
passwd readable socket.
(Resolv::DNS::Requester::UnconnectedUDP#sender): use appropriate
socket for the target nameserver.
(Resolv::DNS::Requester::ConnectedUDP): follow the instance variable
change.
(Resolv::DNS::Requester::TCP#sender): ditto.
(Resolv::DNS::Config#nameserver_port): new method.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@27956 b2dd03c8-39d4-4d8f-98ff-823fe69b080e