For cadaver or neon.

Description of problem:
Certificate verification failure for servers with an intermediate certificate.

Version-Release number of selected component (if applicable):
cadaver-0.23.2-4.x86_64
neon-0.28.3-2.x86_64
gnutls-2.4.2-3.fc10.x86_64

How reproducible:
Always.

Steps to Reproduce:

Success:
$ gnutls-cli </dev/null --x509cafile /etc/pki/tls/certs/ca-bundle.crt \
   -V -p 443 www.kth.se|grep 'certificate is'
- Peer's certificate is trusted

Failure:
$ cadaver </dev/null https://www.kth.se/|head -1
WARNING: Untrusted server certificate presented for `www.kth.se':

Success:
$ cadaver </dev/null https://bugzilla.redhat.com/|head -1
Could not access / (not WebDAV-enabled?):

Actual results:
cadaver fails for www.kth.se

Expected results:
cadaver should be able to verify the certificate.