Distributed tinderboxing

[Mark Linimon]

> error logs are written out.  It would be trivial to add some code  
> there akin to the pointyhat scripts

I'd really like to use the same code.  I refactored the code that does
the actual extracting to, um, ports/Tools/portbuild/scripts/processonelog:

#
# Read a single errorlogfile and output a line of the format
#    $filename|$portname|$affected|$logsize|$dir|$maintainer|\
#    $reason|$tag|$broken|$datetime

Almost all the Really Special Stuff is there to extract 'reason'.  It's
some really nasty heuristics but it's better than nothing.  I'd hate to
see us duplicate that code but I'd love to be able to access its results
on a tinderbox.

mcl