"git pbchk" needs to acknowledge co-authors
Recent fixes in SMB and vioif have been the result of multiple contributors. SMB chose "Authored by:" and vioif chose "Contributions by:".
This bug needs two problems solved:
1.) What set of <foo> will illumos accept in "<foo> by: <email>" bylines?
2.) How do we fix git pbchk appropriately?
Set to hard difficulty because of problem #1.