Fix and tweak wording in the release notes.
Fix and tweak wording in the release notes.

Suggested by: Simon Large <slarge@slarge.plus.com>

* www/svn_1.2_releasenotes.html
  (new-switches): Correct the list of commands that can ignore externals.
    Tweak to imply that future servers will still support fast log --limit.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@854981 13f79535-47bb-0310-9956-ffa450edef68

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,wbond/subversion,wbond/subversion