* guix/scripts/build.scm (set-build-options-from-command-line): Pass
 #:offload? #f when 'keep-failed? is true.
* doc/guix.texi (Common Build Options): Document it.

* guix/scripts/archive.scm (%default-options): Replace 'build-hook?'
with 'offload?'.
* guix/scripts/build.scm (set-build-options-from-command-line): Pass
 #:offload? instead of #:use-build-hook?.
(%standard-build-options): Use the 'offload? key instead of 'build-hook?.
(%default-options): Replace 'build-hook?' with 'offload?'.
* guix/scripts/copy.scm (%default-options): Likewise.
* guix/scripts/deploy.scm (%default-options): Likewise.
* guix/scripts/environment.scm (%default-options): Likewise.
* guix/scripts/pack.scm (%default-options): Likewise.
* guix/scripts/package.scm (%default-options): Likewise.
* guix/scripts/pull.scm (%default-options): Likewise.
* guix/scripts/system.scm (%default-options): Likewise.
* guix/scripts/time-machine.scm (%default-options): Likewise.
* guix/store.scm (set-build-options): Have #:use-build-hook? default
to *unspecified*.  Add #:offload?.  Add call to 'warn-about-deprecation'
when #:use-build-hook? is specified.

This is a followup to bc69ea2d.

* guix/scripts/build.scm (show-build-options-help): Rename
"--no-build-hook" to "--no-offload".
(%standard-build-options): Likewise, and warn when "--no-build-hook" is
passed.
* nix/nix-daemon/guix-daemon.cc (options): Add "--no-offload" and mark
"--no-build-hook" as hidden.
* guix/scripts/offload.scm: Adjust comment.
* doc/guix.texi (Invoking guix-daemon, Common Build Options): Replace
"--no-build-hook" with "--no-offload".
* etc/completion/fish/guix.fish, etc/completion/zsh/_guix: Adjust
accordingly.

* doc/guix-cookbook.texi (A Scheme Crash Course): Add cross-reference to
the Guile manual.

* doc/guix-cookbook.texi (A Scheme Crash Course)
(Extended example): Use @result{}, @print{}, and @error{}.

* doc/guix-cookbook.texi: Use Texinfo quotes ``like this'' instead of
straight quotes or curly quotes.

* doc/guix-cookbook.texi (Direct checkout hacking): Refer to "Running
Guix Before It Is Installed".

* doc/guix-cookbook.texi: Use @lisp instead of @example where
appropriate.

* tests/build-utils.scm ("wrap-script, simple case"): Use the real
'which' instead of mocking it.

* tests/build-utils.scm ("wrap-script, raises condition"): Use 'guard'
instead of "catch 'srfi-34".

* gnu/packages/linux.scm (linux-libre-5.3-version): Update to 5.3.13.
(linux-libre-5.3-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.19-version): Update to 4.19.86.
(linux-libre-4.19-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.14-version): Update to 4.14.156.
(linux-libre-4.14-pristine-source): Update hash.

* gnu/packages/admin.scm (netcat-openbsd): New variable.

* gnu/packages/statistics.scm (r-rrcov): Update to 1.4-9.

* gnu/packages/cran.scm (r-future): Update to 1.15.1.

* gnu/packages/cran.scm (r-epi): Update to 2.40.

* gnu/packages/cran.scm (r-vioplot): Update to 0.3.3.

* gnu/packages/mes.scm (mes): Update to 0.21.

* gnu/packages/guile-xyz.scm (guile-gi): Update to 0.2.1.
[arguments]: Add phase to start Xorg server for tests.
[native-inputs]: Add xorg-server.

* gnu/packages/music.scm (bsequencer): New variable.

* gnu/packages/cran.scm (r-bookdown): Update to 0.16.

* gnu/packages/cran.scm (r-protviz): Update to 0.5.1.
[inputs]: Remove perl and python-2.

* gnu/packages/cran.scm (r-rnifti): Update to 1.0.0.

* gnu/packages/cran.scm (r-tidytree): Update to 0.3.0.

* gnu/packages/cran.scm (r-sjplot): Update to 2.8.0.
[propagated-inputs]: Remove r-broom and r-nlme; add r-effectsize and
r-parameters.

* gnu/packages/cran.scm (r-tidyverse): Update to 1.3.0.
[propagated-inputs]: Add r-pillar.

* gnu/packages/cran.scm (r-parameters): Update to 0.3.0.

* gnu/packages/cran.scm (r-abn): Update to 2.2.

* gnu/packages/cran.scm (r-limsolve): Update to 1.5.6.

* gnu/packages/cran.scm (r-prodlim): Update to 2019.11.13.

* gnu/packages/cran.scm (r-webshot): Update to 0.5.2.

* gnu/packages/cran.scm (r-insight): Update to 0.7.0.

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

* gnu/packages/statistics.scm (r-rcppeigen): Update to 0.3.3.7.0.

* gnu/packages/statistics.scm (r-rlang): Update to 0.4.2.

* gnu/packages/statistics.scm (r-digest): Update to 0.6.23.

* gnu/packages/statistics.scm (r-pheatmap): Move from here...
* gnu/packages/cran.scm (r-pheatmap): ...to here.

* gnu/packages/cran.scm (r-scales): Update to 1.1.0.
[propagated-inputs]: Remove r-rcpp; add r-farver and r-lifecycle.

* gnu/packages/statistics.scm (r-scales): Move variable from here...
* gnu/packages/cran.scm (r-scales): ...to here.