Merge the r1467440 group from trunk:

 * r1467440, r1467450, r1467481
   Unclutter maintainer-mode stack traces.
   Justification:
     Code was in flux when the branch was cut.  Maintainer sanity.
   Votes:
     +1: danielsh, stsp, brane


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x@1468301 13f79535-47bb-0310-9956-ffa450edef68
Merge r1467597 from trunk:

 * r1467597
   Better error message if authentication fails and -F - was used.
   Justification:
     Nice-to-have usability fix. Explains a side-effect of the new-in-1.8
     interactive prompting default behaviour which could be considered a
     regression from 1.7 (use case now requires --force-interactive).
     See here for details:
     http://subversion.tigris.org/issues/show_bug.cgi?id=3913#desc5
   Votes:
     +1: stsp, pburba, brane


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x@1468302 13f79535-47bb-0310-9956-ffa450edef68