* man.el (Man-notify-flag): replaces the old Man-notify

	* man.el (Man-notify-flag): replaces the old Man-notify
	variable, use the old one if it is bound as initial value.
	(Man-reuse-okay-flag): replaces Man-reuse-okay.
	(Man-downcase-section-letters-flag): replaces
	Man-downcase-section-letters.
	(Man-circular-pages-flag): replaces Man-circular-pages.
	(Man-auto-section-alist): variable deleted.
	(Man-section-translations-alist): removed the "3x" translation.
	(Man-untabify-command, Man-untabify-command-args): new vars.
	(Man-sed-command, Man-awk-command): new variables.
	(Man-sysv-sed-script, Man-berkeley-sed-script): new constants.
	(Man-name-regexp, Man-page-header-regexp): new variable.
	(Man-heading-regexp): changed default value.
	(Man-reference-regexp): now refers to previous regexps.
	(Man-arguments): new buffer-local variable.
	(Man-page-mode-string): changed default value.
	(Man-mode-map): changed the meanings of ",", ".", "q".  Added new
	keys ">", "<", "k".
	(Man-page-mode-string): function deleted.
	(Man-init-defvars): New function used for initialising the system
	and environment dependent variables Man-fontify-manpage-flag,
	Man-uses-untabify, Man-sed-script, Man-filter-list.
	(Man-delete-trailing-newlines): function deleted.
	(Man-make-page-mode-string): new subst.
	(Man-build-man-command): now subst instead of function.  Modified
	to comply with the new format of Man-filter-list.
	(Man-downcase): function deleted.
	(Man-translate-references): complete rewrite.
	(Man-linepos): function deleted.
	(Man-match-substring): new function.
	(Man-default-man-args): function deleted.
	(Man-default-man-entry): complete rewrite.
	(man, manual-entry): function-alias relationship reversed.
	(man): prompt changed, prompt using interactive, call
	Man-init-defvars, set Man-arguments.
	(Man-notify-when-ready): manage the 'pushy value.
	(Man-fontify-manpage): substitute Man-set-fonts.
	(Man-cleanup-manpage): new function.
	(Man-bgproc-sentinel): cleanup, call Man-fontify-manpage and
	Man-cleanup-page when necessary.
	(Man-mode): call Man-strip-page-headers and Man-unindent.
	(Man-build-section-alist, Man-build-references-alist,
	Man-build-page-list): substs instead of functions.
	(Man-build-references-alist): cleanup.
	(Man-build-page-list): new algorithm.
	(Man-strip-page-headers, Man-unindent): new substs.
	(Man-find-section): assume section names start in column 1.
	(Man-quit): bury the buffer instead of killing it, delete the
	frame when necessary.
	(Man-kill): new function.
	(Man-goto-page): do the right thing when the manpage is not found,
	do not assume that Man-build-references-alist is broken.