Revert part of r22580, fixing a potential backwards compatibility problem.
Revert part of r22580, fixing a potential backwards compatibility
problem.

* subversion/svnserve/main.c
  (main): Make the --root option again no longer mandatory on Windows.

Suggested by: rooneg
Review by: Vlad Georgescu <vgeorgescu@gmail.com>


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@862775 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion