GitLab

(SUBDIR_MAKEFILES): Update for new doc/ directory layout.
(man/Makefile, lispref/Makefile, lispintro/Makefile): Rename and
update these targets for new doc/ directory layout.
(doc/misc/Makefile): New target.
(install-arch-indep): Use mansrcdir for new location of manpages.
(mostlyclean, clean, distclean, maintainer-clean, unlock)
(relock, info, dvi): Update targets for new doc/ directory layout.