Enable no_delay by default and deprecate it
Enable no_delay by default and deprecate it

anson-tang/PyMySQL,jheld/PyMySQL,xjzhou/PyMySQL,modulexcite/PyMySQL,nju520/PyMySQL,DashaChuk/PyMySQL,yeyinzhu3211/PyMySQL,lzedl/PyMySQL,NunoEdgarGub1/PyMySQL,wraziens/PyMySQL,eibanez/PyMySQL,pymysql/pymysql,wraziens/PyMySQL,Ting-y/PyMySQL,PyMySQL/PyMySQL,xjzhou/PyMySQL,lzedl/PyMySQL,boneyao/PyMySQL,MartinThoma/PyMySQL,yeyinzhu3211/PyMySQL,eibanez/PyMySQL,methane/PyMySQL