gnu: libmicrohttpd: Update to 0.9.55.

* gnu/packages/gnunet.scm (libmicrohttpd): Update to 0.9.55.
[arguments]: Add 'add-missing-LDFLAGS' phase.

guix package: Warn when invoked with '-u -something'.

Fixes <https://bugs.gnu.org/27820>.
Reported by Hartmut Goebel <h.goebel@crazy-compilers.com>.

* guix/scripts/package.scm (%options) <"-u">: Emit a warning when ARG
starts with "-".

gnu: xf86-video-intel: Update snapshot.

* gnu/packages/xorg.scm (xf86-video-intel): Update to 2100efa.
Introduce 'revision' variable.

gnu: guile-bytestructures: Install .go files to lib/guile/X.Y.

* gnu/packages/guile.scm (guile-bytestructures)[arguments]: Install .go
files to OBJECT-DIR, defined as OUT/lib/guile/X.Y/site-ccache.

gnu: tor: Remove '--enable-expensive-hardening' option.

* gnu/packages/tor.scm (tor)[arguments]: Remove '--enable-expensive-hardening' option.

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

gnu: erlang: Update to 20.0.

* gnu/packages/erlang.scm (erlang): Update to 20.0.

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

gnu: network-manager: Add dependency on Newt.

Suggested by Mark H Weaver.

* gnu/packages/gnome.scm (network-manager)[inputs]: Add NEWT.

gnu: guile-git: Skip faulty tests on non-x86_64.

Reported by Mark H Weaver.

* gnu/packages/guile.scm (guile-git)[arguments]: Add 'skip-tests' phase
unless on x86_64-linux.

gnu: libgit2: Add "debug" output.

* gnu/packages/version-control.scm (libgit2)[outputs]: New field.

gnu: libgit2: Update to 0.26.0.

* gnu/packages/version-control.scm (libgit2): Update to 0.26.0.  Remove
"libgit2-use-after-free.patch".
* gnu/packages/patches/libgit2-use-after-free.patch: Remove.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: efl: Add wayland support.

* gnu/packages/enlightenment.scm (efl)[inputs]: Add wayland-protocols.
Move mesa ...
[propagated-inputs]: ... to here. Add libinput, libxkbcommon, wayland.
[arguments]: Add flags to enable wayland, elput and drm.

gnu: gst-plugins-good: Update disable-failing-tests phase.

* gnu/packages/gstreamer.scm (gst-plugins-good)[arguments]: Change the
list of tests to disable during 'disable-failing-tests phase.

services: ntp: Use the NTP pool via the 'guix' zone.

* gnu/services/networking.scm (%ntp-servers): Use *.guix.pool.ntp.org.

gnu: automake: Add 1.15.1.

* gnu/packages/autotools.scm (automake/latest): New variable.

gnu: guix: Search .go files of dependencies in lib/guile/.

* gnu/packages/package-management.scm (guix)[arguments]: Add (srfi
srfi-26) to #:modules.  Introduce 'gopath', distinct from 'path'.

gnu: guix: Update snapshot.

* gnu/packages/package-management.scm (guix): Update to 228a398.

git-download: Remove call to 'canonicalize-path'.

* guix/git-download.scm (git-predicate): Remove call to
'canonicalize-path' since this could lead to discrepancies.  For
instance it broke 'make update-guix-package' since it passes a
non-canonical directory name.

services: openssh: Extensions provide extra authorized keys.

* gnu/services/ssh.scm (extend-openssh-authorized-keys): New procedure.
(openssh-service-type)[compose, extend]: New fields.
* doc/guix.texi (Networking Services): Document the extension.

services: openssh: Add 'authorized-keys' field.

* gnu/services/ssh.scm (<openssh-configuration>)[authorized-keys]: New
field.
(authorized-key-directory): New procedure.
(openssh-config-file): Honor 'authorized-keys'.
(openssh-activation): Use 'with-imported-modules'.  Make /etc/ssh
755.  Create /etc/ssh/authorized_keys.d.
* doc/guix.texi (Networking Services): Document it.

services: cuirass: Set 'GIT_SSL_CAINFO' and 'GIT_EXEC_PATH'.

Reported by Ricardo Wurmus.

* gnu/services/cuirass.scm (cuirass-shepherd-service): Pass
 #:environment-variables.