ShadowSocks protocol fixes:

- remote for OpenVPN is set to real ip address
- remote ip will be added as alias in docker container
- ss-local graceful shutdown
- crash fixes

client/protocols/shadowsocksvpnprotocol.h

@@ -17,13 +17,16 @@ public:
 
 protected:
     void readShadowSocksConfiguration(const QJsonObject &configuration);
-    QString shadowSocksExecPath() const;
 
 protected:
     QJsonObject m_shadowSocksConfig;
 
+private:
+    static QString shadowSocksExecPath();
+
 private:
     QProcess m_ssProcess;
+    QTemporaryFile m_shadowSocksCfgFile;
 };
 
 #endif // SHADOWSOCKSVPNPROTOCOL_H