* lisp/url/url-irc.el (url-irc-function): Change signature of function
interface to expect a final "scheme" argument, such as "ircs".
(url-irc): Call `url-irc-function' with new positional argument, the
scheme extracted via `url-type' from the input URL.
(url-irc-erc, url-irc-rcirc, url-irc-zenirc): Accept a URL scheme as a
sixth positional arg.
(url-ircs-default-port, url-ircs): Add new autoloaded constant and
alias for `url-scheme-get-property' to recognize.  Do this to avoid
having to add another file.
* lisp/net/browse-url.el (browse-url-irc-function): Add new option.
(browse-url--irc): Add new function to call `browse-url-irc-function'.
(browse-url-default-handlers): Add "irc://" entry.
(browse-url-irc): Add new function to serve as general handler for
"irc://" URLS.  Accept trailing variadic args to accommodate
non-browse-url interfaces as well.
* test/lisp/net/browse-url-tests.el
(browse-url-tests-select-handler-irc): Add test for "irc://" URL
pattern.
* etc/NEWS: Mention select browse-url and url-irc
changes.  (Bug#56514.)

Lexvars with special names like 'ignored' or 'unused' are no longer
treated specially.

* lisp/ansi-color.el (ansi-color-process-output):
* lisp/cus-edit.el (customize-apropos-options):
* lisp/cus-theme.el (customize-create-theme):
* lisp/dired-aux.el (dired-hide-all):
* lisp/emacs-lisp/crm.el (crm--choose-completion-string):
* lisp/emacs-lisp/tabulated-list.el (tabulated-list-revert):
* lisp/ido.el (ido-choose-completion-string):
* lisp/international/mule-diag.el (describe-font-internal):
* lisp/mail/sendmail.el (sendmail-user-agent-compose):
* lisp/progmodes/fortran.el (fortran-uncomment-region):
* lisp/progmodes/prolog.el (prolog-inferior-guess-flavor):
* lisp/progmodes/ruby-mode.el (ruby-indent-line, ruby-indent-exp):
* lisp/url/url.el (url-mm-callback):
* lisp/xwidget.el (xwidget-webkit-history-reload): Prepend an
underscore to unused function parameter names.
* lisp/emacs-lisp/cconv.el (cconv--dummy-var): Remove unused
constant.
* lisp/files.el (hack-local-variables-filter): Remove unused lexvar.

Binding it causes errors when some of the enclosed code ends up
loading a `.el` file, and it is unnecessary since the rest of
the code (in `url-file-asynch-callback`) is already careful to
use `insert-file-contents-literally`.

* lisp/url/url-handlers.el (url-insert-file-contents-literally):
Kill the URL buffer after use.

* lisp/gnus/gnus-group.el (gnus-read-ephemeral-bug-group): Don't
bind coding system variables, because that leads to loading other
files (like cookie files) using that coding system (bug#58227).

* lisp/url/url-handlers.el (url-insert-file-literally): New function.
(url-insert): Allow forcing no-decode.

* lisp/url/url.el (url-retrieve-synchronously): Don't kill the
process buffer unless we made one (bug#58218).  This makes HTTP
free connection marking work on premature timeouts.

* lisp/allout.el (allout-exposure-change-hook)
(allout-structure-added-hook, allout-structure-deleted-hook)
(allout-structure-shifted-hook):
* lisp/arc-mode.el (archive-extract-hooks):
* lisp/buff-menu.el (Buffer-menu-buffer+size-width):
* lisp/calendar/timeclock.el (timeclock-modeline-display)
(timeclock-modeline-display, timeclock-update-modeline):
* lisp/cedet/semantic/db-el.el
(semanticdb-elisp-sym-function-arglist):
* lisp/cedet/semantic/db-file.el (semanticdb-save-database-hooks):
* lisp/cedet/semantic/edit.el (semantic-change-hooks)
(semantic-edits-new-change-hooks)
(semantic-edits-delete-change-hooks)
(semantic-edits-reparse-change-hooks):
* lisp/cedet/semantic/lex.el (semantic-lex-reset-hooks):
* lisp/comint.el (comint--unquote&expand-filename)
(comint-unquote-filename):
* lisp/custom.el (user-variable-p):
* lisp/dired.el (dired-shrink-to-fit, dired-pop-to-buffer)
(dired-sort-set-modeline):
* lisp/ebuff-menu.el (Electric-buffer-menu-mode):
* lisp/emacs-lisp/byte-run.el (macro-declaration-function):
* lisp/emacs-lisp/checkdoc.el (custom-print-functions)
(checkdoc-comment-style-hooks):
* lisp/emacs-lisp/cl-lib.el (custom-print-functions):
* lisp/emacs-lisp/edebug.el (gud-inhibit-global-bindings):
* lisp/erc/erc-dcc.el (erc-dcc-chat-filter-hook):
* lisp/eshell/esh-mode.el (eshell-status-in-modeline):
* lisp/eshell/eshell.el (eshell-add-to-window-buffer-names)
(eshell-remove-from-window-buffer-names):
* lisp/faces.el (set-face-underline-p, font-list-limit):
* lisp/files.el (automount-dir-prefix, toggle-read-only):
* lisp/filesets.el (filesets-cache-fill-content-hooks):
* lisp/frame.el (automatic-hscrolling):
* lisp/generic-x.el (javascript-generic-mode)
(javascript-generic-mode-hook):
* lisp/gnus/gnus-start.el (gnus-subscribe-newsgroup-hooks):
* lisp/gnus/nndiary.el (nndiary-request-create-group-hooks)
(nndiary-request-update-info-hooks)
(nndiary-request-accept-article-hooks):
* lisp/htmlfontify.el (hfy-post-html-hooks):
* lisp/international/mule-cmds.el
(inactivate-current-input-method-function)
(inactivate-input-method, input-method-inactivate-hook)
(ucs-insert):
* lisp/international/quail.el (quail-inactivate)
(quail-inactivate-hook):
* lisp/international/robin.el (robin-inactivate)
(robin-inactivate-hook):
* lisp/leim/quail/hangul.el (hangul-input-method-inactivate):
* lisp/leim/quail/uni-input.el (ucs-input-inactivate):
* lisp/mail/emacsbug.el (report-emacs-bug-info):
* lisp/mh-e/mh-e.el (mh-kill-folder-suppress-prompt-hooks):
* lisp/mpc.el (mpc-string-prefix-p):
* lisp/net/rcirc.el (rcirc-print-hooks, rcirc-sentinel-hooks)
(rcirc-receive-message-hooks, rcirc-activity-hooks):
* lisp/obsolete/crisp.el (crisp-mode-modeline-string):
* lisp/pcomplete.el (pcomplete-arg-quote-list)
(pcomplete-quote-argument):
* lisp/progmodes/cc-mode.el (c-prepare-bug-report-hooks):
* lisp/progmodes/python.el (python-info-ppss-context)
(python-info-ppss-context-type)
(python-info-ppss-comment-or-string-p, python-indent)
(python-guess-indent, python-buffer, python-preoutput-result)
(python-proc, python-send-receive, python-send-string)
(python-use-skeletons):
* lisp/progmodes/sh-script.el (sh-maybe-here-document):
* lisp/replace.el (query-replace-interactive):
* lisp/strokes.el (strokes-modeline-string):
* lisp/subr.el (redraw-modeline):
* lisp/term.el (term-default-fg-color, term-default-bg-color):
* lisp/textmodes/tex-mode.el (latex-string-prefix-p)
(tex-string-prefix-p):
* lisp/url/url-parse.el (url-recreate-url-attributes):
* lisp/vc/add-log.el (change-log-acknowledgement):
* lisp/vc/ediff-wind.el
(ediff-choose-window-setup-function-automatically):
* lisp/vc/pcvs-util.el (cvs-string-prefix-p):
* lisp/vc/vc.el (vc-string-prefix-p):
* lisp/window.el (display-buffer-function):
* lisp/winner.el (winner-mode-leave-hook): Remove many functions and
variables obsolete since 24.3.

* lisp/buff-menu.el (list-buffers--refresh):
* lisp/dired.el (dired-mode-map):
* lisp/files.el (abbreviate-file-name):
* lisp/generic-x.el (generic-default-modes):
* lisp/mh-e/mh-funcs.el (mh-kill-folder):
* lisp/progmodes/hideif.el (hide-ifdef-mode-submap):
* lisp/replace.el (query-replace-read-from):
* lisp/term.el (term):
* lisp/window.el (display-buffer): Don't use above deleted
functions and variables.

* src/marker.c (Fbuffer_has_markers_at): Delete DEFUN obsolete
since 24.3.
(syms_of_marker) <Sbuffer_has_markers_at>: Delete defsubr.
* lisp/subr.el (buffer-has-markers-at): Remove obsoletion
of above deleted DEFUN.
* etc/TODO: Doc fix; don't mention above deleted function.

* admin/cus-test.el (cus-test-get-options):
* lisp/pcomplete.el: Doc fixes; don't mention removed items.
; * etc/NEWS: List removed items.

* lisp/url/url-about.el (url-probe-protocols): Remove "rlogin".
* lisp/url/url-gw.el (url-gateway-rlogin-host)
(url-gateway-rlogin-user-name, url-gateway-rlogin-parameters)
(url-open-rlogin): Make obsolete.  (Bug#56891)
(url-open-stream):
* lisp/url/url-misc.el (url-do-terminal-emulator): Warn when using
"rlogin".
(url-rlogin): Make obsolete.
* lisp/url/url-vars.el (url-gateway-method): Remove "rlogin"
choice.

* lisp/url/url-gw.el (url-gw-rlogin-obsolete-warned-once)
* lisp/url/url-misc.el (url-misc-rlogin-obsolete-warned-once): New
variables, immediately marked obsolete.

* doc/misc/url.texi (telnet/tn3270): Rename section from
"rlogin/telnet/tn3270".
(Gateways in general, Customization): Don't mention "rlogin"
method.