Attribute relay message processing errors as client errors rather than client errors

[chris13524]

All errors in processing incoming relay messages are treated the same: as a server error, even if it's a problem coming from the client. For now we've increased the threshold on acceptable number of server errors, but we need to properly attribute client errors as client errors, make a separate chart, and reduce the alarm threshold for server errors.

[chris13524]

Closing; these errors will be attributed as they occur. The major ones have already been fixed.