tunnel: check for server aliveness
tunnel: check for server aliveness

usirin/koding,szkl/koding,drewsetski/koding,koding/koding,szkl/koding,alex-ionochkin/koding,alex-ionochkin/koding,drewsetski/koding,mertaytore/koding,andrewjcasal/koding,koding/koding,acbodine/koding,koding/koding,usirin/koding,rjeczalik/koding,kwagdy/koding-1,usirin/koding,gokmen/koding,sinan/koding,jack89129/koding,gokmen/koding,alex-ionochkin/koding,acbodine/koding,drewsetski/koding,drewsetski/koding,cihangir/koding,usirin/koding,jack89129/koding,alex-ionochkin/koding,mertaytore/koding,gokmen/koding,cihangir/koding,drewsetski/koding,sinan/koding,usirin/koding,cihangir/koding,mertaytore/koding,rjeczalik/koding,andrewjcasal/koding,kwagdy/koding-1,drewsetski/koding,szkl/koding,andrewjcasal/koding,kwagdy/koding-1,rjeczalik/koding,mertaytore/koding,koding/koding,gokmen/koding,sinan/koding,alex-ionochkin/koding,rjeczalik/koding,szkl/koding,acbodine/koding,alex-ionochkin/koding,cihangir/koding,szkl/koding,andrewjcasal/koding,jack89129/koding,szkl/koding,sinan/koding,rjeczalik/koding,mertaytore/koding,koding/koding,kwagdy/koding-1,alex-ionochkin/koding,acbodine/koding,andrewjcasal/koding,andrewjcasal/koding,koding/koding,drewsetski/koding,cihangir/koding,sinan/koding,cihangir/koding,andrewjcasal/koding,jack89129/koding,jack89129/koding,kwagdy/koding-1,jack89129/koding,koding/koding,acbodine/koding,usirin/koding,jack89129/koding,mertaytore/koding,gokmen/koding,cihangir/koding,usirin/koding,gokmen/koding,kwagdy/koding-1,mertaytore/koding,szkl/koding,koding/koding,kwagdy/koding-1,acbodine/koding,sinan/koding,usirin/koding,szkl/koding,gokmen/koding,rjeczalik/koding,mertaytore/koding,cihangir/koding,acbodine/koding,andrewjcasal/koding,drewsetski/koding,alex-ionochkin/koding,kwagdy/koding-1,rjeczalik/koding,gokmen/koding,jack89129/koding,sinan/koding,sinan/koding,acbodine/koding,rjeczalik/koding