Allow davautocheck.sh to work without wget.
Allow davautocheck.sh to work without wget.

(Logic taken from dist.sh)

* subversion/tests/cmdline/davautocheck.sh:
  (main): Fallback to curl if wget is not available.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@862279 13f79535-47bb-0310-9956-ffa450edef68

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