* .gitignore: Add 'ChangeLog'.
* build-aux/gitlog-to-changelog: New file, from Gnulib.
* build-aux/gitlog-to-emacslog: New file.
* CONTRIBUTE: Document the revised workflow.
* Makefile.in (clean): Remove *.tmp and etc/*.tmp*
instead of just special cases.
(CHANGELOG_HISTORY_INDEX_MAX, CHANGELOG_N, gen_origin): New vars.
(ChangeLog, unchanged-history-files, change-history)
(change-history-commit): New rules.
* admin/admin.el (make-manuals-dist--1):
Don't worry about doc/ChangeLog.
* admin/authors.el: Add a FIXME.
* admin/make-tarball.txt:
* lisp/calendar/icalendar.el:
* lisp/gnus/deuglify.el:
* lisp/obsolete/gulp.el:
* lwlib/README:
Adjust to renamed ChangeLog history files.
* admin/merge-gnulib (GNULIB_MODULES): Add gitlog-to-changelog.
* admin/notes/repo: Call it 'master' a la Git, not 'trunk' a la Bzr.
Remove obsolete discussion of merging ChangeLog files.
New section "Maintaining ChangeLog history".
* build-aux/git-hooks/pre-commit:
Reject attempts to commit files named 'ChangeLog'.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* make-dist: Make and distribute top-level ChangeLog if there's a
.git directory.  Distribute the new ChangeLog history files
instead of scattered ChangeLog files.  Distribute the new files
gitlog-to-changelog and gitlog-to-emacslog.
Fixes: bug#19113

Run admin/update-copyright.

* lisp/info.el (Info-mode-map): Remove left-over binding.
* lisp/net/tramp.el (tramp-handle-make-symbolic-link): Mark unused arg.
* lisp/obsolete/gulp.el (gulp-create-m-p-alist): Remove unused var `mnt-tm'.
* lisp/progmodes/gud.el (gud-gdb-completions): Remove unused var `start'.
* lisp/url/url-http.el (url-http-activate-callback): Make debug more verbose.
* src/process.c: Whitespace and line-break nitpicks.

* lisp/obsolete/gulp.el: Move here from emacs-lisp/.

* doc/emacs/ack.texi (Acknowledgments): Remove reference to obsolete file.