* allout.el (allout-encrypt-unencrypted-on-saves): Do not provide insecure

* allout.el (allout-encrypt-unencrypted-on-saves): Do not provide insecure
exception for current topic.  Also note that auto-saves are handled
differently.

(allout-auto-save-temporarily-disabled), (allout-just-did-undo): State
variables for tracking auto-save inhibition situation.

(allout-write-contents-hook-handler): Rename from
'allout-write-file-hook-handler', and describe how it depends on
write-contents-functions sensitivity to non-nil value to prevent file
write.

(allout-auto-save-hook-handler): Remove.  auto-save does not check this in
individual buffers, only in the starting buffer, so this is not the right
way for us to inhibit auto-save in a buffer according to its condition.

(allout-mode): Use new allout-write-contents-hook-handler, and only with
write-contents-functions.  Remove auto-save provisions - they're
implemented elsewhere.

(allout-before-change-handler): If undo is in progress, note that for
attention of allout-post-command-business.

(allout-post-command-business): If the command we're following was an undo,
check for change in the status of encrypted items and adjust auto-save
inhibitions accordingly.

(allout-toggle-subtree-encryption): Adjust auto-save inhibition according
to whether there are or aren't any plain-text topics pending encryption.

(allout-inhibit-auto-save-info-for-decryption): Adjust buffer-saved-size
and some allout state to inhibit auto-saves if there are plain-text topics
pending encryption.

(allout-maybe-resume-auto-save-info-after-encryption): Adjust
buffer-saved-size and some allout state to not inhibit auto-saves if there
are no longer any plain-text topics pending encryption.

(allout-next-topic-pending-encryption), (allout-encrypt-decrypted): No
longer provide for exemption of the current topic.