Fix out-of-tree dist and rpm to use the source tree
Document raw sockets and PacketSpec in the Unicon book
Add uping and uigmp demos under uni/progs
Add IGMPv2/v3 PacketSpec layouts to package net
Add ICMP echo PacketSpec layouts to package net
Add PacketSpec binary packet layouts to package net
tests/posix: cover raw socket open() plumbing
Add raw socket open() plumbing with proto= and hdrincl=