Steps to reproduce:
1. Get matterhorn source
2. Build as all-in-one
InboxScannerService is configured for /inbox, but /inbox directory is absent by default.
Workaround (if any):
Manually create $FELIX_HOME/inbox
This affects rc5 and rc6. Inbox was present on prior release candidates.
Seems similar to
D'oh. This is because Git trims empty directories, I'll fix it up before release.
Into r/1.4.1 with commit 917ab35.