Add more info to the protocol doc.
Add more info to the protocol doc.

wfxiang08/beanstalkd,bmhatfield/beanstalkd,pinguo-xudianyang/beanstalkd,lzpfmh/beanstalkd,LomoX-Offical/beanstalkd-win,wyzssw/beanstalkd,mobliyishengyuan/beanstalkd,amyvmiwei/beanstalkd,davies/beanstalkd,handautsav/beanstalkd,orangeholic/beanstalkd,PhillipMwaniki/beanstalkd,mobliyishengyuan/beanstalkd,davies/beanstalkd,tdg5/beanstalkd,pinguo-xudianyang/beanstalkd,ifduyue/beanstalkd,LomoX-Offical/beanstalkd-win,qbdsoft/beanstalkd,r3jack/beanstalkd,lzpfmh/beanstalkd,wfxiang08/beanstalkd,potatosalad/beanstalkd,Qihoo360/beanstalkd-win,orangeholic/beanstalkd,mickeyouyou/beanstalkd,justintung/beanstalkd,cgvarela/beanstalkd,qbdsoft/beanstalkd,kr/beanstalkd,naderman/beanstalkd,justintung/beanstalkd,naderman/beanstalkd,JensRantil/beanstalkd,diditaxi/beanstalkd,naderman/beanstalkd,aidaima/beanstalkd,diditaxi/beanstalkd,bmhatfield/beanstalkd,potatosalad/beanstalkd,yetone/beanstalkd,mickeyouyou/beanstalkd,JensRantil/beanstalkd,PhillipMwaniki/beanstalkd,CompendiumSoftware/beanstalkd,tdg5/beanstalkd,Qihoo360/beanstalkd-win,aidaima/beanstalkd,CompendiumSoftware/beanstalkd,yetone/beanstalkd,amyvmiwei/beanstalkd,r3jack/beanstalkd,handautsav/beanstalkd,wyzssw/beanstalkd,ifduyue/beanstalkd,kr/beanstalkd,cgvarela/beanstalkd