Fix a connection dropout when trying to send a null message. Also rename the error message in asyncUDPSend.
Merge pull request #641 from godarklight/send-error-fix

Fix a connection dropout when trying to send a null message.
Fix #647
Merge pull request #648 from godarklight/fix-647

Fix #647
Remove startup delay from SHA checking
Merge pull request #651 from godarklight/threadpool-change

Remove startup delay from SHA checking