Patch v2ray-core to allow non-inbound configures.

[Yaspee]

As the title is, v2ray-core must accept a legal inbound configure to start, but waVingOcean is already an "inbound".

And v2ray-core may not plan to have tun2ray as an inbound soon.

v2ray/Planning#1

[TanNang]

@Yaspee

You can modify these lines:

https://github.com/v2ray/ext/blob/d65cd8c6a68851f6624f89edb77f6e77c6203590/tools/conf/v2ray.go#L468

[xiaokangwang]

I would like to recommend you to include an alternative inbound such as socks5 to workaround this issue.

Since V2Ray-core is changing so rapidly, I believe patching is not an ideal solution for long term.