[Request] Support more granular permission levels for issuing commands to mvsd.

[ehsueh]

It will be nice to have different levels of permission for different non-account commands. For example, maybe we want to configure the server such that client can getinfo through the API call but not shutdown the mvsd. 👍

[canguruhh]

please check the config file options if you can find existing ways to limit

for example this option:

[server]
allow_rpc_methods = getinfo getheight