(stable) Discard stdout/stderr from the aphlict subprocess when running in daemon (normal) mode
Summary:
Fixes T11818. We don't discard output, so once we read more than 2GB of output we'll exceed the maximum size of a string in an internal buffer.
Instead, configure the future so output is discarded.
Test Plan: Added logging to libphutil/, saw internal buffer grow steadily before this change and stay constant at 0 after this change.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11818
Differential Revision: https://secure.phabricator.com/D16855