Show database number in cli prompt when non-zero
Show database number in cli prompt when non-zero

sunqb/redis-1,oas1986/redis-s,oas1986/redis-s,oas1986/redis-s,oas1986/redis-s,Linked95/redis,sunqb/redis-1,cen-li/redis,VCTLabs/redis,jango2015/redis,AndersonFirmino/redis,rgl/redis,esomenos/redis,dmajkic/redis,jango2015/redis,esomenos/redis,mdavid/redis-windows-port,sunqb/redis-1,rgl/redis,Linked95/redis,dmajkic/redis,VCTLabs/redis,VCTLabs/redis,coverxiaoeye/redis,esomenos/redis,lonely8rain/redis,lonely8rain/redis,jango2015/redis,cen-li/redis,mdavid/redis-windows-port,VCTLabs/redis,AndersonFirmino/redis,rgl/redis,AndersonFirmino/redis,dmajkic/redis,coverxiaoeye/redis,coverxiaoeye/redis,cen-li/redis,rgl/redis,lonely8rain/redis,cen-li/redis,mdavid/redis-windows-port,Linked95/redis