Add some debug endpoints to livegrep.
Add some debug endpoints to livegrep.

lekkas/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,lekkas/livegrep,lekkas/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep