Fix daemonization regression

Commit af923d2d16 broke daemonization.
Revert the change but get rid of the warning message when running
in the foreground.

main.go

@@ -199,10 +199,8 @@ func main() {
 	}
 
 	fmt.Println("Filesystem ready.")
-	if !foreground {
 	// Send notification to our parent
 	sendUsr1()
-	}
 	// Wait for SIGING in the background and unmount ourselves if we get it
 	// This prevents a dangling "Transport endpoint is not connected" mountpoint
 	handleSigint(srv, mountpoint)

sendusr1.go

@@ -34,7 +34,5 @@ func sendUsr1() {
 		if err != nil {
 			fmt.Printf("sendUsr1: Signal: %v\n", err)
 		}
-	} else {
-		fmt.Printf("Not running under the gocryptfs wrapper - will not daemonize\n")
 	}
 }