* configure.in (lisp_frag): New output file.
* src/lisp.mk: New file, split from Makefile.in, and inheriting its
copyright years.
* src/Makefile.in (lisp): Move to separate file, inserted by @lisp_frag@.
(shortlisp): Remove.
($(etc)/DOC): Edit lisp.mk rather than using $shortlisp.
* lisp/loadup.el, doc/misc/Makefile.in: Comment changes.
