This significantly speeds up things like substituting the closure of a
.drv.  This is a followup to 5ff52145.

* guix/scripts/substitute.scm (http-multiple-get): Add #:open-connection
and #:keep-alive? and honor them.
(open-connection-for-uri/maybe): Use 'open-connection-for-uri/cached'
instead of 'guix:open-connection-for-uri'.  Call 'http-multiple-get'
within 'call-with-cached-connection'.
(open-connection-for-uri/cached): Add #:timeout and #:verify-certificate?
and honor them.
(call-with-cached-connection): Add 'open-connection'  parameter and
honor it.

* gnu/packages/patchutils.scm (patchwork): Update to 3.0.0.

* gnu/packages/emacs-xyz.scm (emacs-svg-tag-mode): New variable.

* gnu/packages/pdf.scm (xournalpp): Update to 1.0.20.

* gnu/packages/ruby.scm (ruby-pg): Update to 1.2.3.

* gnu/packages/xfce.scm (mousepad): Update to 0.5.1.

Signed-off-by: Christopher Baines <mail@cbaines.net>

* gnu/packages/xfce.scm (xfce4-genmon-plugin): Update to 4.1.0.

Signed-off-by: Christopher Baines <mail@cbaines.net>

* gnu/packages/xfce.scm (xfce4-screenshooter): Update to 1.9.8.

Signed-off-by: Christopher Baines <mail@cbaines.net>

* gnu/packages/xfce.scm (xfce4-calculator-plugin): Update to 0.7.1.

Signed-off-by: Christopher Baines <mail@cbaines.net>

* gnu/packages/xfce.scm (xfce4-terminal): Update to 0.8.10.

Signed-off-by: Christopher Baines <mail@cbaines.net>

* gnu/packages/web.scm (esbuild): Update to 0.8.26.

Signed-off-by: Christopher Baines <mail@cbaines.net>

* doc/guix-cookbook.texi (Guix Profiles in Practice): Change "friction-less"
to "frictionless".

* guix/import/crate.scm (%crate-updater): Change name to `crate', so it is on
par with the importer, and the manual.

Fixes <https://issues.guix.gnu.org/45351>.

* guix/scripts/import/crate.scm (show-help): Fix URL.

* gnu/packages/emacs-xyz.scm (emacs-org): Update to 9.4.4.
[arguments]: Install orgguide.info, but ignore orgcard.pdf, not provided in
Org 9.4.4.
(emacs-org-contrib): Update to 20201222.

* gnu/packages/geo.scm (grass): Update to 7.8.5.

* gnu/packages/linux.scm (sysstat): Update to 12.4.2.

* gnu/packages/linux.scm (ipset): Update to 7.10.

* gnu/packages/graphics.scm (goxel): Update to 0.10.7.

* gnu/packages/games.scm (wesnoth): Update to 1.14.15.

* gnu/packages/freedesktop.scm (libfprint): Update to 1.90.6.

* gnu/packages/cpp.scm (xtl): Update to 0.6.23.

* gnu/packages/finance.scm (electron-cash): Update to 4.2.3.

* gnu/packages/dictionaries.scm (lttoolbox): Update to 3.5.3.

* gnu/packages/admin.scm (htop): Update to 3.0.4.

* gnu/packages/man.scm (man-pages): Update to 5.10.

* gnu/packages/cran.scm (r-altmeta): New variable.

Signed-off-by: Ricardo Wurmus <rekado@elephly.net>

* gnu/packages/cran.scm (r-metafor): New variable.

Signed-off-by: Ricardo Wurmus <rekado@elephly.net>

* gnu/packages/embedded.scm (fc-host-tools): Update to 14.

Fixes <https://bugs.gnu.org/29485

>.

* gnu/packages/networking.scm (perl-geo-ip): Remove variable.

Signed-off-by: Leo Famulari <leo@famulari.name>

* gnu/packages/kde.scm (kdevelop): Update to 5.6.1.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/gnome.scm (lollypop): Update to 1.4.6.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/gnome.scm (lollypop): Add dependency on glib-networking.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/benchmarks.scm (intel-mpi-benchmarks): Update to 2019.6.
[source]: Add 'snippet'.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/maths.scm (octave, octave-cli): Update to 6.1.0.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/browser-extensions.scm (uassets): Update to 0b1bde395.
(ublock-origin): Update to 1.32.0.

* gnu/packages/emacs-xyz.scm (emacs-simple-modeline): New variable.

* gnu/packages/authentication.scm (pamtester): New variable.

* guix/import/cran.scm (%input-style): New parameter.
(format-inputs): Use it.
* guix/scripts/import/cran.scm (guix-import-cran): Set the %input-style
parameter.
 (%options): Add "--style" option.
* doc/guix.texi (Invoking guix import): Document it.

* gnu/packages/lisp-xyz.scm (cl-zstd, ecl-cl-zstd, sbcl-cl-zstd): New
  variables.