Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November.  Change these FTP URLs to https://ftp.gnu.org
instead.  Make similar changes for URLs to other organizations moving
away from FTP.  Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.

Bug#28003
* lisp/newcomment.el (comment-indent-new-line): Check
comment-auto-fill-only-comments.  Reverts earlier change.
* lisp/simple.el (internal-auto-fill): Call auto-fill-function, not
do-auto-fill.

Respect comment-auto-fill-only-comments when auto-filling and a
comment syntax is defined.

* lisp/newcomment.el (comment-indent-new-line): Do not check
comment-auto-fill-only-comments.
* lisp/simple.el (internal-auto-fill): New defun.
* src/cmds.c (internal_self_insert): Call Qinternal_auto_fill, not
auto_fill_function.
(syms_of_cmds): Define Qinternal_auto_fill.

* lisp/newcomment.el (comment-choose-indent): Interpret a cons of two
integers as indicating a range of acceptable indentation.
(comment-indent): Don't apply `comment-inline-offset',
`comment-choose-indent' already does that.
(comment-indent-function):
* doc/emacs/programs.texi (Options for Comments): Document new
acceptable return values.
* etc/NEWS: Announce it.

When `comment-continue' has only blanks, `comment-padright' produces a
regexp that matches the empty string, so `uncomment-region-default'
will loop infinitely.
* lisp/newcomment.el (comment-padright): Only return a regexp if STR
has nonblank characters.

* test/lisp/progmodes/js-tests.el (js-mode-auto-fill): Test with
`comment-multi-line' both nil and non-nil.
* lisp/newcomment.el (comment-multi-line): Mark safe if it's a
boolean.
* etc/NEWS: Mention that `js-mode' now sets `comment-multi-line'.

Run admin/update-copyright.

This fixes bug #22369.

* lisp/newcomment.el (comment-make-bol-ws): New function.
(comment-make-extra-lines): Use new function instead of a crude `make-string'.

Run admin/update-copyright.