rust-clippy: apply some more trivial fixes All of these were hinted at by clippy and make the code simpler.

rust-clippy: simplify `match` to `if let` This was hinted at by clippy, and makes it more obvious that nothing is happening in the `None` case.

censor: accept multiple revision in a single call This is useful when dealing with corruption, as all the corrupted revision can be dealt with in one go.

censor: be more verbose about the other steps too If we informs the user about head checking, we should tell him when the other operation happens too. Otherwise the user can imagine to still be in the head checking part.

censor: add a command flag to skip the head checks In some case we spend hours of time checking the heads to censors a simple file is not a good behavior. Especially when censors is used to removed corrupted content.

censor: inform the user that we are spending time checking heads The time this can consume can be a surprise to the user, lets be explicit about it.

censor: mention that we check the heads in the help And add a message to will explain the possibly long time spent doing this.

persistent-nodemap: respect the mmap setting when refreshing data After writing updated data, we reload the in-memory data. However, that logic was… wrong. We were doing file read when mmap was requested and when the configuration was requesting to not use mmap… we were using it. This should now be fine.

rust-index: only access offsets if revlog is inline Accessing the `RwLock` ended up showing up in profiles even with no contention. Offsets only exist for inline revlogs, so gate everything behind an inline check.

rust-index: cache the head nodeids python list Same optimization as before, but for the nodeids this time.