Sentinel: send SLAVEOF with MULTI, CLIENT KILL, CONFIG REWRITE.
Sentinel: send SLAVEOF with MULTI, CLIENT KILL, CONFIG REWRITE.

This implements the new Sentinel-Client protocol for the Sentinel part:
now instances are reconfigured using a transaction that ensures that the
config is rewritten in the target instance, and that clients lose the
connection with the instance, in order to be forced to: ask Sentinel,
reconnect to the instance, and verify the instance role with the new
ROLE command.

ScottKaiGu/redis,kolonse/redis,erwin00776/redis-2.8-optimize,Jonavin/redis,sidsen/redis,shanegxxiao/redis,janeasystems/redis,liqiang199105/redis,upsoft/redis,hanmichael/redis,laurencee/redis,janeasystems/redis,sidsen/redis,quangnguyen90/redis,enginekit/redis,ideaar/redis,quangnguyen90/redis,alpha8/redis,kolonse/redis,damy/redis,nandhanurrevanth/redis,ScottKaiGu/redis,sidsen/redis,adamweixuan/redis,laurencee/redis,enginekit/redis,Jonavin/redis,upsoft/redis,kts12345/redis,alpha8/redis,janeasystems/redis,Jonavin/redis,jacklee0810/redis,erwin00776/redis-2.8-optimize,jqk6/redis,upsoft/redis,Jonavin/redis,LittlePeng/redis,alpha8/redis,janeasystems/redis,ideaar/redis,Cybermaxs/redis,StartTheShift/redis-shift,jaambee/redis,ideaar/redis,alpha8/redis,Jonavin/redis,jaambee/redis,Cybermaxs/redis,jacklee0810/redis,jacklee0810/redis,jaambee/redis,sidsen/redis,damy/redis,janeasystems/redis,quangnguyen90/redis,adamweixuan/redis,ScottKaiGu/redis,hanmichael/redis,erwin00776/redis-2.8-optimize,hanmichael/redis,fanxu/redis,miminus/redis,quangnguyen90/redis,alpha8/redis,ideaar/redis,ScottKaiGu/redis,kts12345/redis,Cybermaxs/redis,StartTheShift/redis-shift,liqiang199105/redis,liqiang199105/redis,jacklee0810/redis,laurencee/redis,upsoft/redis,fanxu/redis,jqk6/redis,laurencee/redis,damy/redis,kts12345/redis,jqk6/redis,LittlePeng/redis,laurencee/redis,fanxu/redis,damy/redis,sidsen/redis,nandhanurrevanth/redis,kolonse/redis,kolonse/redis,nandhanurrevanth/redis,ScottKaiGu/redis,quangnguyen90/redis,hanmichael/redis,jqk6/redis,hanmichael/redis,enginekit/redis,ideaar/redis,miminus/redis,kolonse/redis,damy/redis,StartTheShift/redis-shift,shanegxxiao/redis,miminus/redis,miminus/redis,Cybermaxs/redis,erwin00776/redis-2.8-optimize,adamweixuan/redis,sidsen/redis,upsoft/redis,Cybermaxs/redis,nandhanurrevanth/redis,jaambee/redis,enginekit/redis,jacklee0810/redis,enginekit/redis,jaambee/redis,LittlePeng/redis,shanegxxiao/redis,miminus/redis,adamweixuan/redis,jqk6/redis,liqiang199105/redis,kts12345/redis,liqiang199105/redis,kts12345/redis,shanegxxiao/redis,adamweixuan/redis,nandhanurrevanth/redis,fanxu/redis,shanegxxiao/redis