Attribute all client errors as client errors and reset HTTP 5xx alarm back to 0

[chris13524]

Throughout the code there are many TODOs where client errors are currently thrown as server errors. These need to individually be investigated and each error attributed as a client or a server error. Eventually reducing the size of or even eliminating the NotifyServerError struct.

Once these are are all done, the HTTP 5xx alarm should be reset back to 0 so we know if there are any unexpected errors.