Make file handles have "/Fxxx" as the URI
Summary:
Primarily, this fixes searching for F123 in global search.
The info URI is now a better URI than the "best" URI for files, and doesn't have redirect issues.
Test Plan: Searched for F123 in global search.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D10330