Merge pull request #210 from maggot611/deamon_exit

[bug fix]weed daemon exit due to hangup signal when terminal close

go/weed/signal_handling.go

@@ -11,11 +11,13 @@ import (
 func OnInterrupt(fn func()) {
 	// deal with control+c,etc
 	signalChan := make(chan os.Signal, 1)
+	// controlling terminal close, daemon not exit   
+	signal.Ignore(syscall.SIGHUP)
 	signal.Notify(signalChan,
 		os.Interrupt,
 		os.Kill,
 		syscall.SIGALRM,
-		syscall.SIGHUP,
+		// syscall.SIGHUP,
 		syscall.SIGINT,
 		syscall.SIGTERM,
 		syscall.SIGQUIT)