no longer clobbering config files

setup/mail-dovecot.sh

@@ -67,8 +67,28 @@ tools/editconf.py /etc/dovecot/conf.d/10-mail.conf \
 
 # Create, subscribe, and mark as special folders: INBOX, Drafts, Sent, Trash, Spam and Archive.
 cp conf/dovecot/conf.d/15-mailboxes.conf /etc/dovecot/conf.d/
-cp conf/dovecot/conf.d/20-imap.conf /etc/dovecot/conf.d/
-cp conf/dovecot/conf.d/90-quota.conf /etc/dovecot/conf.d/
+sed -i "s/mail_plugins = .*/mail_plugins = \$mail_plugins imap-quota/" /etc/dovecot/conf.d/20-imap.conf
+sed -i "s/protocol imap/mail_plugins = \$mail_plugins quota\nprotocol imap/" /etc/dovecot/conf.d/20-imap.conf
+
+# configure stuff for quota support
+cat > /etc/dovecot/conf.d/90-quota.conf << EOF;
+plugin {
+  quota = maildir
+
+  quota_grace = 10%
+
+  quota_status_success = DUNNO
+  quota_status_nouser = DUNNO
+  quota_status_overquota = "522 5.2.2 Mailbox is full"
+}
+
+service quota-status {
+    executable = quota-status -p postfix
+    inet_listener {
+        port = 12340
+    }
+}
+EOF
 
 # ### IMAP/POP