Replace NEKit dependency with reduced subset

GlassVPN/zhuhaow-NEKit/Socket/AdapterSocket/Factory/SOCKS5AdapterFactory.swift

@@ -0,0 +1,21 @@
+import Foundation
+
+/// Factory building SOCKS5 adapter.
+open class SOCKS5AdapterFactory: ServerAdapterFactory {
+    override public init(serverHost: String, serverPort: Int) {
+        super.init(serverHost: serverHost, serverPort: serverPort)
+    }
+
+    /**
+     Get a SOCKS5 adapter.
+
+     - parameter session: The connect session.
+
+     - returns: The built adapter.
+     */
+    override open func getAdapterFor(session: ConnectSession) -> AdapterSocket {
+        let adapter = SOCKS5Adapter(serverHost: serverHost, serverPort: serverPort)
+        adapter.socket = RawSocketFactory.getRawSocket()
+        return adapter
+    }
+}