Follow-up to r34967: Print a warning when unrecognized file was specified in argument of the '--config-option' option.
Follow-up to r34967:
Print a warning when unrecognized file was specified in argument of
the '--config-option' option.

* subversion/svn/main.c
  (main): Print a warning when unrecognized file was specified in argument of
   the '--config-option' option.

Suggested by: stsp
              danielsh


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@875054 13f79535-47bb-0310-9956-ffa450edef68

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