Add a FAQ entry about how to use external diff commands with "--diff-cmd" and "--extensions".
Add a FAQ entry about how to use external diff commands with "--diff-cmd" and
"--extensions".

Patch by: Chris Pepper <pepper@reppep.com>

* www/project_faq.html (diff-cmd): New question and answer.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@851314 13f79535-47bb-0310-9956-ffa450edef68

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