syncthing/DaemonProcess.swift: Use single-dash syncthing v2.x.x commandline args (#249)

Author: luckman212

syncthing/DaemonProcess.swift

@@ -64,7 +64,7 @@ let MaxKeepLogLines = 200
 
         let p = Process()
         p.environment = environment
-        p.arguments = ["-no-browser", "-no-restart", "-logfile=default"]
+        p.arguments = ["--no-browser", "--no-restart", "--logfile=default"]
         p.arguments?.append(contentsOf: self.arguments)
         p.launchPath = path
         p.standardInput = Pipe() // isolate daemon from our stdin