packet.tcp: Re-pack unknown options
packet.tcp: Re-pack unknown options

Previously, unknown options were ignored when re-packing them.  We now
attempt to re-pack them as-is.

noxrepo/pox,noxrepo/pox,MurphyMc/pox,MurphyMc/pox,pthien92/sdn,MurphyMc/pox,noxrepo/pox,MurphyMc/pox,pthien92/sdn,pthien92/sdn,pthien92/sdn,pthien92/sdn,MurphyMc/pox,noxrepo/pox