Slow SSL handshake/authentication

[Marc Strapetz]

One of our Subversion 1.9 users is encountering a slow SSL handshake (or 
maybe even subsequent connection) to a Jetty 7.6.16.v20140903 server. 
This happens on Windows and OSX. Interestingly, when using Subversion 
1.7, access works fast as expected. Also, accessing the same URL using 
curl or from the browser works fast.

Any ideas what could cause this? I'm also able to reproduce the problem 
and I can provide credentials for a test repository on the affected server.

-Marc