[Modules] mod_gnutls: Failed to load Client CA File ... The given memory buffer is too short to hold parameters.

[Jack Bates]

Sander Marechal reports that he cannot use the CA certificates
distributed in the Debian ca-certificates package with mod_gnutls:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=511573

I confirmed that this behaviour is the same in mod_gnutls trunk revision
403:

ket% /usr/sbin/apache2 -X -f httpd.conf
Syntax error on line 14 of httpd.conf:
GnuTLS: Failed to load Client CA File
'/etc/ssl/certs/ca-certificates.crt': (-51) The given memory buffer is
too short to hold parameters.
ket%