Signed-off-by: strawberry <strawberry@pupbrain.dev>

can't update ruma to very latest commit because of the weird JsOption thing for syncv4 that i can't wrap my head around how to use, not important anyways

Signed-off-by: strawberry <strawberry@pupbrain.dev>

This speeds up handling of /_matrix/federation/v1/send/:transaction_id
when more than one event contains unknown keys.

In particular, when receiving multiple PDUs with dead servers in their
auth chain, timeouts of each server accumulate and can make handling of
incoming requests take several minutes, to the point the client closes
the connection (eg. matrix.org has a 2 minute timeout), causing new
events to be dropped eventually.

Workaround for element web while waiting for https://github.com/matrix-org/matrix-js-sdk/pull/3635

https://rust-lang.github.io/rust-clippy/master/index.html#op_ref

https://rust-lang.github.io/rust-clippy/master/index.html#str_to_string

https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes

Allows Conduit users to join restricted rooms if we are not currently participating

Rejoin room over federation if we are not participating in it; do not include invited users in participating servers calculation

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