Add support for 2.8 redis slave syntax
Add support for 2.8 redis slave syntax

gale320/flexisip,biddyweb/flexisip,BelledonneCommunications/flexisip,BelledonneCommunications/flexisip,BelledonneCommunications/flexisip,biddyweb/flexisip,biddyweb/flexisip,gale320/flexisip,BelledonneCommunications/flexisip,gale320/flexisip,biddyweb/flexisip,gale320/flexisip