* C/usage-calendar.sgml: Incorporated chgs from Kevin.
* C/config-prefs.sgml: began total overhaul of structure and added
content reflecting new prefs items. needs LOTS more work.
* C/usage-mail.sgml: changed some references to id's in the
config-prefs section.
* C/fig/config-mail.png: changed filename from config-prefs.png
svn path=/trunk/; revision=3417
6e57118823