Log message:
Comment out dead sites.

Log message:
Import calltree-perl-0.1 as devel/calltree-perl.

The program contains a collection of tools for analyzing Perl
code. Analyzing a static program runs headlong into the halting problem --
no automatic process can find all infinite loops, or fully model dynamic
data generated within an arbitrary program. If you need to solve that kind
of problem, a runtime debugger, human insight, and good programming
practices go a long way. On the other hand, if you're reading a new Perl
code for the first time, you've come to the right place.