Ha! Wrote this combined tree dumper and consistency checker just for fun.

...and saw that the expression parser generates inconsistent trees under
some circumstances. So I've decided that the dumper code may be of public
interest :). The actual bugfixes will follow later.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101087 13f79535-47bb-0310-9956-ffa450edef68