Error validating server certificate

$ svn info https://svn.macosforge.org/repository/macports
Error validating server certificate for 'https://svn.macosforge.org:443':
 - The certificate is not issued by a trusted authority. Use the
   fingerprint to validate the certificate manually!
Certificate information:
 - Hostname: *.macosforge.org
 - Valid: from Thu, 28 Apr 2011 22:45:15 GMT until Sat, 31 May 2014 10:51:08 GMT
 - Issuer: (c) 2009 Entrust, Inc., www.entrust.net/rpa is incorporated by reference, Entrust, Inc., US
 - Fingerprint: bf:77:a4:84:d4:3e:0c:55:28:3d:2a:37:bc:8a:47:39:76:73:b7:02
(R)eject, accept (t)emporarily or accept (p)ermanently?

I am running Subversion 1.6.17 as installed by MacPorts 1.9.2 on Mac OS X 10.6.7. What do I have to do to get Subversion to recognize that the certificate we are using for Mac OS Forge *is* issued by a trusted authority? I want a solution that does not involve every MacPorts contributor having to see this message and press "p"; I want a solution that does not involve anyone seeing this message at all.

Do I have to somehow provide Subversion with a bundle of well-known trusted certificates? MacPorts includes the port curl-ca-bundle which installs a bundle of certs from Mozilla, and is used by the curl port to be able to access https sites. Can Subversion make use of that same bundle?
Received on 2011-05-02 22:04:05 CEST