Revert "Fix async_client sending data without signal" Solaris and Mac does not support MSG_NOSIGNAL flag.
Revert "Fix async_client sending data without signal"
Solaris and Mac does not support MSG_NOSIGNAL flag.

This reverts commit 8e2757cd8d2a7bcf3cbded7b880defc7e1064072.

rimms/jubatus,gintenlabo/jubatus_core,roselleebarle04/jubatus,jubatus/jubatus,jubatus/jubatus,Asuka52/jubatus,kmaehashi/jubatus_core,kumagi/jubatus_core,elkingtonmcb/jubatus,rimms/jubatus_core,mathn/jubatus,gintenlabo/jubatus_core,gintenlabo/jubatus,gintenlabo/jubatus,rimms/jubatus_core,gintenlabo/jubatus_core,kumagi/jubatus_core,Asuka52/jubatus,rimms/jubatus,kumagi/jubatus_core,kumagi/jubatus_core,kmaehashi/jubatus,rimms/jubatus_core,elkingtonmcb/jubatus,roselleebarle04/jubatus,kmaehashi/jubatus_core,kmaehashi/jubatus_core,mathn/jubatus,rimms/jubatus_core,jubatus/jubatus,kmaehashi/jubatus_core,gintenlabo/jubatus_core,kmaehashi/jubatus