Run admin/update-copyright.

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.

Some of the files in oldXMenu use functions from string.h without
including that header which results in compile warnings:

	ChgPane.c:46:5: warning: implicit declaration of function ‘strlen’
	ChgPane.c:46:20: warning: incompatible implicit declaration of
		built-in function ‘strlen’
	ChgSel.c:62:2: warning: implicit declaration of function ‘strlen’
	ChgSel.c:62:17: warning: incompatible implicit declaration of built-in
		function ‘strlen’
	Create.c:220:5: warning: implicit declaration of function ‘strcmp’
	InsPane.c:65:5: warning: implicit declaration of function ‘strlen’
	InsPane.c:65:20: warning: incompatible implicit declaration of
		built-in function ‘strlen’
	InsSel.c:68:5: warning: implicit declaration of function ‘strlen’
	InsSel.c:68:20: warning: incompatible implicit declaration of built-in
		function ‘strlen’
	InsSel.c:75:5: warning: implicit declaration of function ‘strcmp’

Add the necessary ‘#include <string.h>’.

oldXMenu/ChgPane.c, oldXMenu/ChgSel.c, oldXMenu/Create.c, oldXMenu/InsPane.c,
oldXMenu/InsSel.c: add missing #include <string.h>

Run admin/update-copyright.

Work around Bug#22884 by rewording comments and strings to avoid ‘(’
at the start of a line unless it starts a function.  This change
is a short-term hack; in the longer run we plan to fix cc-mode’s
performance for C files that have ‘(’ at the start of a line in a
comment or string.

Run admin/update-copyright.

Run admin/update-copyright.