changesets:
	11018:79181d97f42d "dev: enable support for pd-gem5 runs"
    This patch enables accurate/deterministic simulation of a cluster system
    using pd-gem5.
    
    This patch enables etherlink to operate in two modes: default etherlink
    and pd-gem5 connector mode. In pd-gem5 mode, etherlink will attach a time
    stamp to packets received from interface 0 and detach a time stamp from 
    packets received from interface 1. Assumption is that interface 0 is 
    connected to a network device (NIC or Switch) and interface 1 is connected
    to ethertap.