gnu: perl: Add more missing dependencies on Module::Install.

* gnu/packages/databases.scm (perl-dbix-class, perl-dbix-class-cursor-cached,
  perl-dbix-class-introspectablem2m,
  perl-dbix-class-schema-loader)[native-inputs]: Add PERL-MODULE-INSTALL.
* gnu/packages/web.scm (perl-catalyst-action-renderview,
  perl-catalyst-action-rest, perl-catalyst-authentication-store-dbix-class,
  perl-catalyst-component-instancepercontext, perl-catalyst-model-dbic-schema,
  perl-catalyst-plugin-authentication,
  perl-catalyst-plugin-authorization-roles, perl-catalyst-plugin-configloader,
  perl-catalyst-plugin-session, perl-catalyst-plugin-session-state-cookie,
  perl-catalyst-plugin-stacktrace, perl-catalyst-plugin-static-simple,
  perl-catalyst-traitfor-request-proxybase, perl-catalyst-view-download,
  perl-catalyst-view-json, perl-catalystx-script-server-starman,
  perl-test-www-mechanize, perl-test-www-mechanize-catalyst)[native-inputs]:
  Likewise.
* gnu/packages/xorg.scm (perl-x11-xcb)[native-inputs]: Likewise.

gnu: perl-catalyst-runtime: Update to 5.90115.

* gnu/packages/web.scm (perl-catalyst-runtime): Update to 5.90115.
[native-inputs]: Add PERL-MODULE-INSTALL.

gnu: libmikmod: Add fallback source URL, needed for older versions.

* gnu/packages/sdl.scm (libmikmod)[source]: Add a fallback source URL where
older versions are kept.

download: Remove a SourceForge mirror that never returns 404.

* guix/download.scm (%mirrors)[sourceforge]: Remove
nbtelecom.dl.sourceforge.net, which never returns 404 responses.  This causes
download failures due to hash mismatch, effectively preventing secondary
source URLs from being queried.

packages: Use Guile 2.0 for grafting.

Works around <https://bugs.gnu.org/28211>.
Reported by Marius Bakke <mbakke@fastmail.com>.

* guix/packages.scm (guile-2.0): New procedure.
(package-derivation, package-cross-derivation): Use it when computing
the #:guile argument to 'graft-derivation'.

Merge branch 'master' into core-updates

gnu: gnurl: Update to 7.55.1.

* gnu/packages/gnunet.scm (gnurl): Update to 7.55.1.

Signed-off-by: Tobias Geerinckx-Rice <me@tobias.gr>

gnu: vifm: Update to 0.9.

* gnu/packages/vim.scm (vifm): Update to 0.9.
[source]: Add alternate uri.
[arguments]: Remove build timestamp. Add phase to install vim plugins
into vim plugin directory. Patch more shebangs.

gnu: pspp: Update to 1.0.0.

* gnu/packages/statistics.scm (pspp): Update to 1.0.0.

gnu: perl-test-trap: Update to 0.3.2.

* gnu/packages/perl.scm (perl-test-trap): Update to 0.3.2.
[source, version]: Remove 'v' prefix from version field.

gnu: perl-test-trap: Add missing dependency on Test::Simple.

* gnu/packages/perl.scm (perl-test-trap)[native-inputs]: Add PERL-TEST-SIMPLE.

gnu: bundler: Update to 1.15.4.

* gnu/packages/ruby.scm (bundler): Update to 1.15.4.

gnu: limnoria: Update to 2017.08.18.

* gnu/packages/irc.scm (limnoria): Update to 2017.08.18.

guix download: Support retrieving local file without the URI scheme.

* guix/scripts/download.scm (guix-download): Treat the URL argument as a local
file path when it fails on 'string->uri'.  Call 'fetch' with the processed
'uri' instead of the original URL argument.
* tests/guix-download.sh: Adjust accordingly.

gnu: graphicsmagick: Fix CVE-2017-{12935,12936,12937}.

* gnu/packages/patches/graphicsmagick-CVE-2017-12935.patch,
gnu/packages/patches/graphicsmagick-CVE-2017-12936.patch,
gnu/packages/patches/graphicsmagick-CVE-2017-12937.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/imagemagick.scm (graphicsmagick)[source]: Use them.

gnu: r-minimal: Work around failure to embed reference to "which".

* gnu/packages/statistics.scm (r-minimal)[arguments]: Add phase "patch-which".
[native-inputs]: Move "which" from here...
[propagated-inputs]: ...to here.

gnu: powertabeditor: Update to 2.0.0-alpha10.

* gnu/packages/music.scm (powertabeditor): Update to 2.0.0-alpha10.
[arguments]: Remove "set-target-directories" phase; disable additional tests.

gnu: Add r-annotationfilter.

* gnu/packages/bioinformatics.scm (r-annotationfilter): New variable.

gnu: Add gnome-default-applications.

* gnu/packages/gnome.scm (gnome-default-applications): New public variable.
(gnome): Propagate gnome-default-applications so that nautilus is associated
with folders, not baobab.

gnu: gnome: Propagate font-dejavu.

* gnu/packages/gnome.scm (gnome): Add font-dejavu to propagated inputs, to
  provide a better default for "Monospace".  Otherwise the terminal looks
  horrible and defaults to Nimbus Mono, a Courier-like face.