docker/docker — pull request #8434 by tiborvass (2014-10-07 03:28:59+00:00)
Title: Ignore unknown dockerfile instructions

With the new parser we started considering unknown instructions as errors (which can be desirable) but we don't want to break this behavior right now. I'll leave the debate for another time (can't find the issue).

Ping @erikh @crosbymichael @aluzzardi @jfrazelle