* ntlm.el (ntlm-string-as-unibyte): New macro.

* ntlm.el (ntlm-string-as-unibyte): New macro.
(ntlm-build-auth-response): Use it.

Remove Emacs 20 stuff:
* dgnushack.el (dgnushack-compile): Don't modify max-specpdl-size.
(butlast, mapc, remove): Remove the compiler macros.
* gnus-msg.el (gnus-summary-news-other-window): Use remove instead of delq
 and copy-sequence.
* gnus-art.el (popup-menu): Remove the compiler macro.
* nnmail.el (nnmail-split-fancy): Don't support customizing with Emacs 20.