* doc/guix-cookbook.texi (Environment management): New chapter.

* gnu/packages/networking.scm (net-snmp): Update to 5.9.
[inputs]: Add ncurses.
[native-inputs]: Add pkg-config.

* gnu/packages/emulators.scm (sameboy): Update to 0.13.6.

* gnu/packages/less.scm (lesspipe)[arguments]: Add phase to patch
paths to tput and file.

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

* gnu/packages/embedded.scm (fc-host-tools): Update to 13.
[description]: Modify.

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

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

* gnu/packages/lxqt.scm (lxqt)[propagated-inputs]: Add lxqt-globalkeys.

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

* gnu/packages/gnome.scm (piper): Update to 0.5.1. Disable tests.

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

* gnu/packages/gnome.scm (libratbag): Update to 0.14.

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

* gnu/packages/simulation.scm (fullswof-2d): New variable.

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

* gnu/packages/audio.scm (rtaudio): New variable.

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

* gnu/packages/python-xyz.scm (dosage): New variable.

* gnu/packages/nicotine.scm (nicotine): New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

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

* gnu/packages/emacs-xyz.scm (emacs-epkg): Update to 3.2.2.

* gnu/packages/ruby.scm (jekyll): Loosen the requirement for kramdown.

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

Includes fixes for CVE-2020-8617, CVE-2020-8619, CVE-2020-8622,
CVE-2020-8623, and CVE-2020-8624.

* gnu/packages/admin.scm (isc-dhcp): Update bundled BIND to 9.11.22.

* gnu/packages/linux.scm (linux-libre-4.9-version): Update to 4.9.233.
(linux-libre-4.9-pristine-source): Update hash.
(deblob-scripts-4.9): Update to 4.9.232.

* gnu/packages/linux.scm (linux-libre-4.4-version): Update to 4.4.233.
(linux-libre-4.4-pristine-source): Update hash.
(deblob-scripts-4.4): Update to 4.4.232.

* gnu/packages/linux.scm (linux-libre-5.8-version): Update to 5.8.3.
(linux-libre-5.8-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-5.7-version): Update to 5.7.17.
(linux-libre-5.7-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-5.4-version): Update to 5.4.60.
(linux-libre-5.4-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.19-version): Update to 4.19.141.
(linux-libre-4.19-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.14-version): Update to 4.14.194.
(linux-libre-4.14-pristine-source): Update hash.

* gnu/packages/aux-files/linux-libre/5.8-arm.conf,
gnu/packages/aux-files/linux-libre/5.8-arm64.conf,
gnu/packages/aux-files/linux-libre/5.8-i686.conf,
gnu/packages/aux-files/linux-libre/5.8-x86_64.conf: New files.
* Makefile.am (AUX_FILES): Add them.
* gnu/packages/linux.scm (linux-libre-5.8): New variable.
(linux-libre-version, linux-libre-pristine-source, linux-libre-source,
linux-libre): Point to linux-libre-5.8*.

Fixes <https://bugs.gnu.org/42789>.

* gnu/packages/linux.scm (linux-libre-deblob-scripts): Set the file-name of the
deblob and deblob-check scripts.

* gnu/packages/groff.scm (ronn-ng): New public variable.

Signed-off-by: Julien Lepiller <julien@lepiller.eu>

* gnu/packages/mail.scm (dovecot)[inputs]: Add zstd:lib.

* gnu/packages/vim.scm (vim): Update to 8.2.1500.

* gnu/packages/enchant.scm (enchant): Add hunspell as an input.

* gnu/packages/aspell.scm (aspell-word-list): Install affix files
corresponding to installed dictionary files.

* gnu/packages/patches/libmhash-hmac-fix-uaf.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/mcrypt.scm (libmhash)[source]: Use it.

* gnu/packages/cran.scm (r-fourcseq): Update to 1.22.1.

* gnu/packages/bioinformatics.scm (r-complexheatmap): Update to 2.4.3.

* gnu/packages/bioinformatics.scm (r-gage): Update to 2.38.3.
[propagated-inputs]: Add r-go-db.

* gnu/packages/bioinformatics.scm (r-annotationhub): Update to 2.20.2.

* gnu/packages/bioinformatics.scm (r-delayedarray): Update to 0.14.1.

* gnu/packages/bioinformatics.scm (r-annotationdbi): Update to 1.50.3.

* gnu/packages/bioinformatics.scm (r-biocviews): Update to 1.56.2.

* gnu/packages/bioconductor.scm (r-biocset): Update to 1.2.2.