These are dates that admin/update-copyright did not update, or
updated incorrectly. Also, back out the copyright-date change to
doc/misc/texinfo.tex, as upstream hasn't updated that date yet.
* configure.ac (doc/man/emacs.1): Generate it.
* Makefile.in (top_bootclean): Remove doc/man/emacs.1.
* make-dist: Do not distribute doc/man/emacs.1.
* admin/admin.el (set-version): No need to update doc/man/emacs.1.
* doc/man/emacs.1.in: Rename from emacs.1.
* .bzrignore: Add doc/man/emacs.1.