Add the trash folder patch.

This is based on the trash folder patch by Cedric Duval.
Modifications to the original patch are:

* Use a flag called M_PURGE instead of M_APPENDED.  The same flag is
  then used in the following "purge" patch instead of adding a
  different flag.

* Removed the counter in context.  The existing context->deleted
  is all that's needed.

* Removed the "auto unset M_PURGE" when M_DELETED is unset inside
  _mutt_set_flag(), although this is convenient, it easily leads to
  header->purge not being reset in a few situations.

* Reset purge flag along with the deleted flag if $delete is answered
  no.

* Set M_PURGE on an edited message. (edit_one_message())

* Preserve purge flag in mutt_reopen_mailbox()

* Turn off OPTCONFIRMAPPEND when saving to the trash, rather than
  hardcoding it off in mutt_save_confirm().  That way, normal save to the
  folder will respect the option.

1 files changed, 1 insertions, 0 deletions

diff --git a/mbox.c b/mbox.c
index 12d42364..36dd81e7 100644
--- a/mbox.c
+++ b/mbox.c
@@ -1265,6 +1265,7 @@ int mutt_reopen_mailbox (CONTEXT *ctx, int *index_hint)
 	  mutt_set_flag (ctx, ctx->hdrs[i], MUTT_READ, old_hdrs[j]->read);
 	}
 	mutt_set_flag (ctx, ctx->hdrs[i], MUTT_DELETE, old_hdrs[j]->deleted);
+	mutt_set_flag (ctx, ctx->hdrs[i], MUTT_PURGE, old_hdrs[j]->purge);
 	mutt_set_flag (ctx, ctx->hdrs[i], MUTT_TAG, old_hdrs[j]->tagged);
 
 	/* we don't need this header any more */