Reduce pubsub manual delay to 6 hours
Reduce pubsub manual delay to 6 hours

Previously, we would force a wait of 24 hours after a pubsub update. This
would prevent us polling, since pubsub appeared to be working. However,
pubsub sometimes doesn't work, and waiting 24 hours is too long. This
should really be limited by scheduleNextUpdate, too.

mjibson/goread,lnmx/goread,mgaitan/goread,wangjun/goread,doublehou/goread,beni55/goread,elancom/goread,elancom/goread,mikecb/goread,mikecb/goread,doublehou/goread,youprofit/goread,youprofit/goread,beni55/goread,wangjun/goread,elancom/goread,youprofit/goread,lnmx/goread,Feitianyuan/goread,mgaitan/goread,P7h/goread,P7h/goread,Feitianyuan/goread,Feitianyuan/goread,mjibson/goread,lnmx/goread,mjibson/goread,wangjun/goread,P7h/goread,mikecb/goread,doublehou/goread,beni55/goread,mgaitan/goread