Enable after_start and before_stop callbacks for multiprocess
Enable after_start and before_stop callbacks for multiprocess

ai0/sanic,yunstanford/sanic,ashleysommer/sanic,jrocketfingers/sanic,lixxu/sanic,channelcat/sanic,lixxu/sanic,yunstanford/sanic,jrocketfingers/sanic,ashleysommer/sanic,channelcat/sanic,channelcat/sanic,Tim-Erwin/sanic,yunstanford/sanic,r0fls/sanic,ashleysommer/sanic,lixxu/sanic,channelcat/sanic,r0fls/sanic,yunstanford/sanic,ai0/sanic,lixxu/sanic,Tim-Erwin/sanic