LAN support, cleans up the code, and is generally a nicer program.  It also
now supports a -v option which will provide lots of debugging output.

postassign - This should be called after assign_wrapper has finished and
the resulting nodes reserved.  It will updated the delays table and the
vname column of reserved.

assign.tcl - Replaced by assign_wrapper.

Note on placement: Both of these programs should end up in libexec.