helper for mulitple connects
helper for mulitple connects

pin3da/zmqpp,xaqq/zmqpp,datasift/zmqpp,zeromq/zmqpp,kernelim/zmqpp,benjamg/zmqpp,sunkin351/zmqpp,benjamg/zmqpp,pin3da/zmqpp,chenwenbin928/zmqpp,xaqq/zmqpp,zeromq/zmqpp,datasift/zmqpp,kernelim/zmqpp,sunkin351/zmqpp,chenwenbin928/zmqpp