Any path component should be accepted

[linuskendall]

To follow the behaviour of the solana validator and be as transparent as possible the cache should accept any path "/" component of the URL. I have seen some applications use this in the wild and it is supported by the validator.

There are also special URL paths in the validator that get translated into non RPC requests like "/health".

Currently cacherpc returns 404 on any path a part from "/". We work around it in our proxy by just overwriting the path component to any request we pass to zubr cache.

[Fedor-sa]

Reproduced with 0.1.27