improved host pool

api/utilsInterfaces_test.go

cmd/root.go

groupChat/utils_test.go

network/follow.go

network/gateway/hostPool.go

network/gateway/sender.go

network/gateway/utils_test.go

network/manager.go

network/message/sendCmix.go

network/message/sendCmixUtils.go

network/message/sendManyCmix.go

network/node/register.go

network/roundTracking.go

network/rounds/retrieve.go

single/manager_test.go