Commit cc333f3233 added a new COPY sub-protocol for taking base backups, but retained support for the previous protocol. For the same reasons articulated in the message for commit 9cd28c2e5f, remove support for the previous protocol from the server. Discussion: http://postgr.es/m/CA+TgmoazKcKUWtqVa0xZqSzbKgTH+X-aw4V7GyLD68EpDLMh8A@mail.gmail.com
cc333f3233
9cd28c2e5f