From a patch privately suggested by Mattias Engdegård on 2020-05-11
in a followup to Bug#40671.
* admin/charsets/cp51932.awk:
* admin/charsets/eucjp-ms.awk:
Generate code that does not modify constant conses.
* doc/misc/emacs-mime.texi (Encoding Customization):
* lisp/emacs-lisp/byte-opt.el (byte-compile-side-effect-free-ops):
* lisp/frameset.el (frameset-persistent-filter-alist):
* lisp/gnus/gnus-sum.el (gnus-article-mode-line-format-alist):
Use append instead of nconc.
* lisp/language/japanese.el (japanese-ucs-cp932-to-jis-map)
(jisx0213-to-unicode):
Use mapcar instead of mapc.
* lisp/language/lao-util.el (lao-transcription-consonant-alist)
(lao-transcription-vowel-alist):
* lisp/language/tibetan.el (tibetan-subjoined-transcription-alist):
Use copy-sequence.
* test/src/fns-tests.el (fns-tests-nreverse):
(fns-tests-sort, fns-tests-collate-sort)
(fns-tests-string-version-lessp, fns-tests-mapcan):
Use copy-sequence, vector, and list.

Run "TZ=UTC0 admin/update-copyright $(git ls-files)".

This mostly changes http: to https: in URLs.  It also updates
some URLs that have moved, removes some URLs that no longer
work, recommends against using procmail (procmail.org no
longer works), and removes some mentions of the
no-longer-existing Gmane, LPF and VTW.
It doesn't update all URLs, just the ones I had time for.
* GNUmakefile (help):
* admin/admin.el (manual-doctype-string):
* admin/charsets/Makefile.in (${charsetdir}/ALTERNATIVNYJ.map):
* admin/charsets/mapconv:
* lisp/net/soap-client.el (soap-create-envelope):
* lisp/org/org.el (org-doi-server-url):
* lisp/textmodes/bibtex.el (bibtex-generate-url-list):
Prefer https: to http: un URLs.

* admin/charsets/mapconv: Revert this [[:xdigit:]] change.
Solaris 10 ‘sed’ does not support [[:xdigit:]].

* admin/charsets/mapconv:
* build-aux/gitlog-to-changelog (parse_amend_file, git_dir_option):
* lisp/progmodes/verilog-mode.el (verilog-delay-re):
(verilog-type-font-keywords, verilog-read-always-signals-recurse):
(verilog-is-number):
* lisp/progmodes/vera-mode.el (vera-font-lock-keywords):
* test/src/emacs-module-tests.el (mod-test-sum-test):
* lisp/xml.el: (xml--entity-replacement-text):
* lisp/version.el (emacs-repository-version-git):
* lisp/textmodes/sgml-mode.el (sgml-quote):
* lisp/textmodes/css-mode.el (css-escapes-re)
(css--colors-regexp):
* lisp/progmodes/prolog.el (prolog-syntax-propertize-function):
* lisp/progmodes/hideif.el (hif-token-regexp, hif-tokenize):
* lisp/progmodes/ebnf-dtd.el: (ebnf-dtd-attlistdecl)
(ebnf-dtd-entitydecl, ebnf-dtd-lex):
* lisp/progmodes/ebnf-ebx.el (ebnf-ebx-hex-character):
* lisp/progmodes/ebnf-abn.el (ebnf-abn-character):
* lisp/progmodes/cperl-mode.el (cperl-highlight-charclass)
(cperl-find-pods-heres):
* lisp/progmodes/cc-mode.el (c-maybe-quoted-number-head)
(c-maybe-quoted-number, c-parse-quotes-before-change)
(c-parse-quotes-after-change, c-quoted-number-head-before-point)
(c-quoted-number-straddling-point):
* lisp/progmodes/ada-mode.el (featurep, ada-in-numeric-literal-p)
(ada-font-lock-keywords):
* lisp/org/org-mobile.el (org-mobile-copy-agenda-files)
* lisp/org/org-table.el (org-table-number-regexp):
(org-mobile-update-checksum-for-capture-file):
* lisp/nxml/xsd-regexp.el (xsdre-gen-categories):
* lisp/nxml/xmltok.el (let*):
* lisp/nxml/rng-xsd.el (rng-xsd-convert-hex-binary)
(rng-xsd-convert-any-uri):
* lisp/nxml/rng-uri.el (rng-uri-file-name-1)
(rng-uri-unescape-multibyte, rng-uri-unescape-unibyte)
(rng-uri-unescape-unibyte-match)
(rng-uri-unescape-unibyte-replace):
* lisp/nxml/rng-cmpct.el (rng-c-process-escapes):
* lisp/nxml/nxml-maint.el (nxml-insert-target-repertoire-glyph-set):
* lisp/net/shr-color.el (shr-color->hexadecimal):
* lisp/mail/rfc2231.el (rfc2231-decode-encoded-string):
* lisp/international/mule-cmds.el (read-char-by-name):
* lisp/htmlfontify.el (hfy-hex-regex):
* lisp/gnus/nneething.el (nneething-decode-file-name):
* lisp/gnus/mml-sec.el (mml-secure-find-usable-keys):
* lisp/gnus/gnus-art.el (gnus-button-mid-or-mail-heuristic-alist):
* lisp/faces.el (read-color):
* lisp/epg.el (epg--status-ERRSIG, epg--status-VALIDSIG)
(epg--status-SIG_CREATED, epg--decode-percent-escape)
(epg--decode-hexstring, epg--decode-quotedstring)
(epg-dn-from-string):
* lisp/emulation/cua-rect.el (cua-incr-rectangle):
* lisp/dnd.el (dnd-unescape-uri):
* lisp/cedet/semantic/lex.el (semantic-lex-number-expression):
* lisp/cedet/semantic/java.el (semantic-java-number-regexp):
* lisp/calc/calc-lang.el (pascal):
* lisp/calc/calc-ext.el (math-read-number-fancy):
* lisp/calc/calc-aent.el (math-read-token):
Replace various combinations of [0-9a-fA-F] with [[:xdigit:]].
(Bug#36167)

Problem with jisx2131-filter reported by Phillip Lord in:
https://lists.gnu.org/r/emacs-devel/2019-06/msg00147.html
* admin/charsets/Makefile.in (SED_SCRIPT):
Put it in $(srcdir), which is not necessarily the working directory.
($(SED_SCRIPT)): Rename from jisx2131-filter.  All uses changed.
(clean): Do not remove SED_SCRIPT.
(extraclean): Remove it here instead.
* make-dist (possibly_non_vc_files): Remove src/emacs-module.h.
Although it is portable and could be distributed in the tarball,
it's too much hassle to do that, so let each builder make it.

Run 'TZ=UTC0 admin/update-copyright $(git ls-files)'.

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.

Run admin/update-copyright.