imap: Add %{appended} to imap_logout_format

doc: Change del to deleted in imap_logout_format default to match code

imap-client: Add %{autoexpunged} to imap_logout_format

example-config: Add imap_fetch_failure setting.

imap: Implemented support for the LITERAL- capability. This replaces the LITERAL+ capability when the imap_literal_minus setting is enabled.

imap: add variables to default imap_logout_format

example-config: Added imap_hibernate_timeout

imap: Added %{deleted}, %{expunged} and %{trashed} to imap_logout_format

Added %{fetch_hdr/body_count/bytes} variables to imap_logout_format

example-config: Moved imap_* and pop3_* settings outside protocol section. There's no need to keep them inside protocol {}, and in case of pop3_uidl_format=%m setting it's actually harmful.

imap-urlauth: Store urlauth keys to the new mailbox attributes.

example-config: Added imap_urlauth_* settings

example-config: imap_logout_format default was wrong.

example-config: Updated tb-extra-mailbox-sep comment.

imap: Added tb-lsub-flags to imap_client_workarounds. Patch by Bruno Tréguier.

imap: imap_capability = +foo only adds new capabilities instead of replacing everything.

imap: Removed netscape-eoh (Netscape 4.x) from imap client workarounds. This client should be long dead by now. Also the workaround causes Dovecot to violate IMAP RFC, so it's not really recommended anyway. --HG-- branch : HEAD

example-config: Added nn- prefix to *.conf files so the sort ordering makes more sense. This is especially important to get mail_plugins = $mail_plugins example working in protocol sections. --HG-- branch : HEAD