* I really didn't like the old attachment code

* I really didn't like the old attachment code
* Information is now saved in the session instead of .info files
* Local filenames are no longer transferred to the client (YEAY)
* The client can no longer delete arbitrary files on the system
  (by setting a   delete[] = "username.pref"   or   delete[] = "../index.php")
  (Untested, but the code looked like it would happily oblige)
* Attachments are now cleared when a new mail message is started
* Attachments are now cleared when a new mail message is forwarded
* No more silly errors when deleting a single attachment

Food for Thought:
* If the attachment information was saved in the preferences, the next time
  the user logs in, old un-deleted attachments could be trashed (or a very
  simple cron job could be made)

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@1207 7612ce4b-ef26-0410-bec9-ea0150e637f0