Disclaim ability to handle cyclic merging.
Disclaim ability to handle cyclic merging.

* www/merge-tracking/design.html
  Disclaim cyclic merging because of lack of support for tracking of
  multiple parents of a change, and link to relevant dev list discussion.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@865569 13f79535-47bb-0310-9956-ffa450edef68

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