Description of problem:
mod_auth_kerb's SRPM does not build as a non-root user. It is because when it
searches for apache's apxs, it does not include /usr/sbin in its path. The
problem is there for both Rawhide and FC4. Attached a patch.

Version-Release number of selected component (if applicable):
mod_auth_kerb-5.0-6

How reproducible:
Always

Steps to Reproduce:
1. Login as a non-root user.
2. rpm -Uvh mod_auth_kerb-5.0-6.src.rpm
3. cd rpmbuild/SPECS (or wherever the spec files are)
4. rpmbuild -ba mod_auth_kerb.spec
  
Actual results:
It fails with an error message that includes:

   checking for apxs... no
   configure: error: failed to find apache apxs executable

Expected results:
It should not fail.