Drop the 'unreliable' label from UDP. Delivery is not guaranteed, but delivery reliability largely depends on network context. Unreliable makes it sound more negative and error-prone than it is. We use UDP because and with the understanding that in most cases it is quite reliable, or reliable enough, rather than simply being unreliable. The point is that we use it for low-latency. Everything else is technical reasoning.
Prefer short statement sentences over long comma sentences.
'an TLSv1 encrypted connection' -> 'a TLSv1 encrypted connection'
Format message type name as inline code to indicate it being a "type" name.
This is done as a separate commit to retain Git change file history association. (Git does not store renames. It assumes renames according to content similarity.)