help wanted
説明
The doc currently reads:
The web-context is a string that uniquely identifies the web context of a request to be dispatched to this service. It MUST NOT start with a
/character. It can have/characters inside as segment separators in case of multi-segment contexts. And it is allowed to be""for root context. If multiple services match the request, the longest context match takes precedence.
We should actually allow it to start with a /. Otherwise, it might get annoying while troubleshooting in development.