Limit response size.

Move HTTP util to container package where it is actually used (it is no longer used elsewhere).
Remove a lot of now dead code from HTTP util.
Remove connection pool since there is at most one connection to a container at any given time.

Changed container response from Option(int, array of bytes) to Either(container error, container result)
with more useful typing.
Detect larger than allowed response from container and truncate it properly and wrap with container error.
Some logging tweaks.
6 files changed