[mod_python] import pyexpat coredumping, shared library problem

I would think that this is pretty common, but quick search could not 
find this problem documented enywhere. Similar problems are documented 
in various places (mysql in FAQ).

python has it's own libexpat, and apache has own or will use installed 
if configure finds it. If they happen to be of a different version this 
can cause interesting coredumps.

This happened on solaris 8, python 2.4.2 and apache httpd-2.0.55

Fixed by installing systemwide expat and getting both python and apache 
to use it.

I think that this should be mentioned in FAQ or somewhere.