Fix NullPointerException on /p/

Requesting just /p/ caused a NullPointerException as the redirection
logic had no project name to form a URL from. Detect requests for /p/
and redirect to Admin > Projects to show the projects the caller has
access to.

Change-Id: I4c2e1cee6d6cbad1be66acf7f89dfcc48ed0d128
1 file changed