Fix deadlock in calling Dns.GetHostAddressesAsync
Fix deadlock in calling Dns.GetHostAddressesAsync

http://www.cnblogs.com/dudu/p/5892778.html

cnblogs/EnyimMemcachedCore,DukeCheng/EnyimMemcachedCore,cnblogs/EnyimMemcachedCore,DukeCheng/EnyimMemcachedCore