Switch to databased-backed cached sessions.
Switch to databased-backed cached sessions.

Previously we were using the default, which was uncached, database-backed
sessions.  This meant that we had to hit the DB for every request by a logged in
user.

Now the sessions will be stored in memcache and the DB.  Reads will come from
memcache if possible, or the DB if not.

ofer43211/unisubs,wevoice/wesub,norayr/unisubs,eloquence/unisubs,eloquence/unisubs,pculture/unisubs,ReachingOut/unisubs,ujdhesa/unisubs,ReachingOut/unisubs,norayr/unisubs,pculture/unisubs,ReachingOut/unisubs,ujdhesa/unisubs,norayr/unisubs,ofer43211/unisubs,norayr/unisubs,ofer43211/unisubs,wevoice/wesub,eloquence/unisubs,ofer43211/unisubs,pculture/unisubs,wevoice/wesub,ujdhesa/unisubs,ujdhesa/unisubs,pculture/unisubs,wevoice/wesub,eloquence/unisubs,ReachingOut/unisubs