convert: raise Abort instead of NoRepo when CVS pserver auth fails. At this point we know the source is CVS, so we should not go through the rest of the converters.

#!/bin/sh
# http://www.selenic.com/mercurial/bts/issue433

hg init a
cd a
echo a > a
hg commit -Ama

hg parents -r 0 doesnotexist
true