Add passthru arg support in the new options system.
Review Request #1270 — Created Nov. 1, 2014 and submitted — Latest diff uploaded
|ity, jsirois, zundel|
Anything after a double-dash is captured as-is. Future changes will
plumb them through to tasks that want them.
This is useful e.g., for passing args through to a tool invoked by a task.
Ran option tests. CI running.