Running the darcs tests, during two of the network tests I was prompted for my 
password, I think because they try to ssh to `whoami`@localhost, which asks 
for a password at least on this mac.

Tests to run non-interactively.

The darcs 2.12 source.

OSX el capitan.

Related: http://bugs.darcs.net/patch1378

Network tests should be on by default only on the development branch,
and off for releasae branches. Anyway, it would be nice to find a
solution that somehow detects if user input is required and skips the
ssh based tests in this case. I have sent a patch (patch1526) that, for
me at least, seems to do this.