Replace NEKit dependency with reduced subset

GlassVPN/zhuhaow-NEKit/Socket/AdapterSocket/Factory/RejectAdapterFactory.swift

@@ -0,0 +1,13 @@
+import Foundation
+
+open class RejectAdapterFactory: AdapterFactory {
+    public let delay: Int
+
+    public init(delay: Int = Opt.RejectAdapterDefaultDelay) {
+        self.delay = delay
+    }
+
+    override open func getAdapterFor(session: ConnectSession) -> AdapterSocket {
+        return RejectAdapter(delay: delay)
+    }
+}