* guix/build-system/minify.scm: New file.
* guix/build/minify-build-system: New file.
* Makefile.am (MODULES): Add new files.
* doc/guix.texi (Build Systems): Document minify-build-system.

* gnu/packages/compression.scm (python-lz4)[synopsis]: Fix typo.

* gnu/packages/compression.scm (python-lz4): Update to 0.10.1.
[native-inputs]: Add python-setuptools-scm.

* gnu/packages/package-management.scm (diffoscope)[home-page]: Use HTTPS.

* gnu/packages/vpn.scm (sshoot): Update to 1.2.6.
[home-page]: Update to new project home.

* gnu/packages/admin.scm (fabric): Update to 1.13.2.  Remove outdated comments.
[source]: Remove ‘patches’.
* gnu/packages/patches/fabric-tests.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

* gnu/packages/tls.scm (certbot, python-acme, python2-acme): Update to 0.17.0.

* gnu/packages/shells.scm (xonsh): Update to 0.5.12.

* gnu/packages/markup.scm (cmark): Update to 0.28.0.

* gnu/packages/admin.scm (thefuck): Update to 3.19.

* gnu/packages/linux.scm (zerofree): Update to 1.1.0.
[home-page, source]: Update from old, inaccessible location.

* gnu/packages/linux.scm (zerofree)[description]: Expand.

* gnu/packages/linux.scm (zerofree)[arguments]: Simplify install phase,
using ‘install-file’.

* gnu/packages/linux.scm (zerofree)[arguments]: Use ‘modify-phases’.

* gnu/packages/linux.scm (sshfs-fuse): Update to 2.10.

Fixes CVE-2017-{2834,2835,2836,2837,2838,2839}.

Reported by Leo Famulari in <https://bugs.gnu.org/27939>.

* gnu/packages/rdesktop.scm (freerdp): Update to 2.0.0-rc0.
[source]: Use tarball release. Adjust file-name.
[arguments]: Remove #:phases.

* gnu/packages/version-control.scm (git)[arguments]: Remove #:tests?. Add
'patch-tests' phase.

* gnu/packages/gnupg.scm (gnupg-1): Update to 1.4.22.

This is a follow-up to commit a8cba9dd.

Reported-by: Efraim Flashner <efraim@flashner.co.il>

This is a follow up to a8cba9dd.

* gnu/packages/bioinformatics.scm: Add (gnu packages cran) to #:use-modules.

* gnu/system/vm.scm (system-disk-image): Use grub-hybrid's grub-mkrescue.
* gnu/bootlader/grub.scm (grub-mkrescue-bootloader): New variable.

* gnu/packages/statistics.scm (r-purrr): Update to 0.2.3.
[propagated-inputs]: Remove r-rcpp and r-lazyeval; add r-rlang.

* gnu/packages/statistics.scm (r-desc): Update to 1.1.1.

* gnu/packages/bioinformatics.scm (r-seqminer): Update to 6.0.

* gnu/packages/bioinformatics.scm (r-wgcna): Update to 1.60.

* gnu/packages/bioinformatics.scm (r-qtl): Update to 1.41-6.

* gnu/packages/bioinformatics.scm (r-seqinr): Update to 3.4-5.

* gnu/packages/bioinformatics.scm (r-optparse): Update to 1.4.4.

* gnu/packages/bioinformatics.scm (r-bookdown): Update to 0.4.

* gnu/packages/statistics.scm (r-tclust): Update to 1.2-7.

* gnu/packages/statistics.scm (r-car): Update to 2.1-5.

* gnu/packages/statistics.scm (r-rcppeigen): Update to 0.3.3.3.0.

* gnu/packages/statistics.scm (r-pbapply): Update to 1.3-3.

* gnu/packages/statistics.scm (r-vgam): Update to 1.0-4.

* gnu/packages/statistics.scm (r-mclust): Update to 5.3.

* gnu/packages/statistics.scm (r-flexmix): Update to 2.3-14.

* gnu/packages/statistics.scm (r-fastica): Update to 1.2-1.

* gnu/packages/statistics.scm (r-cowplot): Update to 0.8.0.

* gnu/packages/statistics.scm (r-rann): Update to 2.5.1.

* gnu/packages/statistics.scm (r-statmod): Update to 1.4.30.