* Clean up temp file
* Remove runtime check for graphviz package - that's really handled
via dependencies
* Note requirement for perl
Addresses PR 23207 by Robert Elz / munnari.OZ.AU BANG kre /
Read dmesg(8) output (e.g. from /var/run/dmesg.boot), and output the
device tree as GIF image to stdout.
Usage: cat /var/run/dmesg.boot | /usr/pkg/bin/dmesg2gif | xv -