Ruby

Socket.udp_server_sockets: use symbol proc

Symbol proc is shorter human and machine code;
and also avoids needing to name variables.

• ext/socket/lib/socket.rb (Socket.udp_server_sockets): use symbol proc

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58320 b2dd03c8-39d4-4d8f-98ff-823fe69b080e