Discussion: remove capability to rename container with HTTP PATCH

[tonistiigi]

Dealing with use cases where dnsdock may not run in the same daemon that it manages and where for some reason event stream may go down and lose data, the changes coming from docker daemon and manually by user are easy to get mixed up and not easy to solve.

more background in #27

I'm suggesting to make container names immutable(docker rename remains the exception) and change it so PATCH request may only change the TTL value and nothing else(or other values can only be changed on containers created with HTTP server). This was always the intention for this method for me.

Because this would be a behaviour breaking change I'm leaving this out here for counter arguments for some time.

I would also release v2.0 so accidental updates should be limited.