gnu: Add ruby-coderay.

* gnu/packages/ruby.scm (ruby-coderay): New variable.

gnu: Add ruby-method-source.

* gnu/packages/ruby.scm (ruby-method-source): New variable.

gnu: sound-theme-freedesktop: Specify the applicable licenses.

* gnu/packages/libcanberra.scm (sound-theme-freedesktop)[license]:
  Specify the actual licenses that apply.

licenses: Add CC-BY-SA and CC-BY.

* guix/licenses.scm (cc-by-sa4.0, cc-by3.0): New variables.

gnu: Set license of the bootstrap tools.

* gnu/packages/bootstrap.scm (package-from-tarball)[license]: Set to
  GPL3+.
* gnu/packages/make-bootstrap.scm (%static-binaries)[license]:
  Likewise.

lint: Add 'license' checker.

* guix/scripts/lint.scm (check-license): New procedure.
  (%checkers): Add 'license' checker.
* tests/lint.scm ("license: invalid license"): New test.

gnu: r-stringr: Provide valid 'home-page' URL.

* gnu/packages/statistics.scm (r-stringr)[home-page]: Set to valid URL.

emacs-build-system: Fix a file name of info directory.

* guix/build/emacs-build-system.scm (move-doc): Adjust to use
  "/share/info" instead of its sub-directory.

gnu: wpa-supplicant-light: Rename to wpa-supplicant-minimal.

* gnu/packages/admin.scm (wpa-supplicant-light): Rename to ...
  (wpa-supplicant-minimal): ...this.
  (wpa-supplicant): Use it.
* gnu/system/install.scm (installation-os): Use it.

gnu: Add Anonymous Pro fonts.

* gnu/packages/fonts.scm (font-anonymous-pro): New variable.

Signed-off-by: Alex Kost <alezost@gmail.com>

gnu: Add ruby-nokogiri.

Co-Authored-By: Pjotr Prins <pjotr.public01@thebird.nl>

* gnu/packages/ruby.scm (ruby-nokogiri): New variable.

gnu: Add ruby-mini-portile.

* gnu/packages/ruby.scm (ruby-mini-portile): New variable.

gnu: Add ruby-minitar.

* gnu/packages/ruby.scm (ruby-minitar): New variable.

tests: Fix typos.

* tests/derivations.scm ("substitutable-derivation?",
  "derivation-prerequisites-to-build and substitutes, local build"): Fix
  harmless typos.

download: Disable offloading for downloads.

* guix/download.scm (url-fetch): Use #:local-build? #t.
* guix/git-download.scm (git-fetch): Likewise.

build: syscalls: Properly handle clone errors.

* guix/build/syscalls.scm (clone): Catch -1 return value and throw error.

gnu: Remove #:select from module import in (gnu packages geeqie).

* gnu/packages/geeqie.scm: Import all of (gnu packages ghostscript) instead
  of selectively only the lcms variable; this helps resolve problems with
  circular dependencies when including the module.

gnu: libtiff: Update home page.

* gnu/packages/image.scm (libtiff)[home-page]: Update.

gnu: vigra: Add support for OpenEXR.

* gnu/packages/image.scm (vigra)[inputs]: Add ilmbase and openexr.
  [arguments]: Augment #:configure-flags.

gnu: Order module imports in (gnu packages photo) alphabetically.

* gnu/packages/photo.scm: Order module imports alphabetically.