GitLab

	* ediff*el: replaced load with require in eval-when-compile.

	* ediff-hook: deleted all invocations of (autoload ...).

	* ediff-util.el (ediff-setup): make window-min-height a local variable
	in ediff control window, and set its min height to 2.
	(ediff-setup-control-buffer): dedicate the control window.
	(ediff-toggle-multiframe): undedicate control window.
	Work directly with ediff-setup-windows-multiframe and
	ediff-setup-windows-plain.

	* ediff-wind (ediff-choose-window-setup-function-automatically): new
	function.
	(ediff-window-setup-function): change initialization.
	(ediff-setup-windows-automatic): deleted.
	(ediff-setup-windows-plain-merge): make control window dedicated.
	(ediff-destroy-control-frame): do not skip frames if working in a
	single frame.

	* emulation/viper-ex.el: move provide's forward, prevent ecursion in
	eval-when-compile.

	* emulation/viper-util.el: move provide's forward, prevent ecursion in
	eval-when-compile.