[Important feature request]Adding a "third-party server login" button on initial page.

[mike-brown8]

Due to the special Internet situation in mainland China. We can not use the default server to login. As a result, the application won't be able to init, it keeps cycling and cycling. To solve the problem, we can add a "third party server login" button to skip the attempt to connect to the default server. And server owners in China won't have to develop another special client for their servers.
Thank you for your effort to the IM system.

Yours sincerely,
Mike.