Log Message:
Update to 2.6.4:

* Version 2.6.4 (released 2009-02-06)

** libgnutls: Accept chains where intermediary certs are trusted.
Before GnuTLS needed to validate the entire chain back to a
self-signed certificate.  GnuTLS will now stop looking when it has
found an intermediary trusted certificate.  The new behaviour is
useful when chains, for example, contains a top-level CA, an
intermediary CA signed using RSA-MD5, and an end-entity certificate.
To avoid chain validation errors due to the RSA-MD5 cert, you can
explicitly add the intermediary RSA-MD5 cert to your trusted certs.
The signature on trusted certificates are not checked, so the chain
has a chance to validate correctly.  Reported by "Douglas E. Engert"
<deengert@anl.gov> in
<http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3351>.

** libgnutls: result_size in gnutls_hex_encode now holds
the size of the result. Report by John Brooks <special@dereferenced.net>.

** libgnutls: gnutls_handshake when sending client hello during a
rehandshake, will not offer a version number larger than the current.
Reported by Tristan Hill <stan@saticed.me.uk>.

** libgnutls: Permit V1 Certificate Authorities properly.
Before they were mistakenly rejected even though
GNUTLS_VERIFY_ALLOW_ANY_X509_V1_CA_CRT and/or
GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT were supplied.  Reported by
"Douglas E. Engert" <deengert@anl.gov> in
<http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3351>.

** libgnutls: deprecate X.509 validation chains using MD5 and MD2 signatures.
This is a bugfix -- the previous attempt to do this from internal x509
certificate verification procedures did not return the correct value
for certificates using a weak hash.  Reported by Daniel Kahn Gillmor
<dkg@fifthhorseman.net> in
<http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3332>,
debugged and patch by Tomas Mraz <tmraz@redhat.com> and Daniel Kahn
Gillmor <dkg@fifthhorseman.net>.

** libgnutls: Fix compile error with Sun CC.
Reported by Jeff Cai <jeff.cai@sun.com> in
<https://savannah.gnu.org/support/?106549>.