[gnome-software/wip/rancell/paid] (25 commits) ...Merge branch 'master' into wip/rancell/paid

[Robert Ancell <rancell src gnome org>]

Summary of changes:

  b0a6f80... trivial: Use SSL when talking to the ODRS server (*)
  cac77a3... trivial: Do not save an empty license (*)
  824d095... trivial: Export a function to gs-utils.h (*)
  2be2c2b... Add a plugin to auto-add some license information (*)
  0caefb9... trivial: switch to localized, HTTPS gnu.org URL (*)
  ae40995... Use AS_APP_QUIRK_NOT_LAUNCHABLE to control the Launch butto (*)
  b18710e... trivial: Fix the name of the underscored plugins (*)
  5d59f81... Find the best AppSteam component when matching any prefixes (*)
  63415cc... Updated Spanish translation (*)
  b9466f4... trivial: Make error messages selectable (*)
  27448ec... Fix launching various KDE4 applications (*)
  bf7f61c... Support getting cached content from /var/cache and /usr/sha (*)
  83b46a2... Fix a couple of CSS errors (*)
  33e099b... Fix potential crash when icons are missing (*)
  c14097c... Updated Spanish translation (*)
  28c6daa... trivial: Fix showing the shell extensions category (*)
  a39c275... Do not unconditionally invalidate the updates list on hardw (*)
  4e5cf6a... Updated Friulian translation (*)
  27844a6... Updated Scottish Gaelic translation (*)
  c79f099... Add self test for the fwupd plugin (*)
  9b2dbfb... trivial: Add missing file if you want to regenerate the .de (*)
  e32cd10... Updated Hungarian translation (*)
  bedcd26... Updated Brazilian Portuguese translation (*)
  5bfcc90... Bump required appstream-glib version (*)
  1e08274... Merge branch 'master' into wip/rancell/paid

(*) This commit already existed in another branch; no separate mail sent