all: sync with master

internal/aghos/os_unix.go

@@ -9,10 +9,18 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+func notifyReconfigureSignal(c chan<- os.Signal) {
+	signal.Notify(c, unix.SIGHUP)
+}
+
 func notifyShutdownSignal(c chan<- os.Signal) {
 	signal.Notify(c, unix.SIGINT, unix.SIGQUIT, unix.SIGTERM)
 }
 
+func isReconfigureSignal(sig os.Signal) (ok bool) {
+	return sig == unix.SIGHUP
+}
+
 func isShutdownSignal(sig os.Signal) (ok bool) {
 	switch sig {
 	case