* rules: Let brltty get installed into /bin, so it can be run e.g. in X for
    accessing terminals.
  * brltty.links: Add compatibility symlink in /sbin/brltty.
  * brltty-udeb.dirs, brltty-udeb.sh, brltty.dirs, brltty.init,
    brltty.install, brltty.service, xbrlapi.install, 20-sbin.patch: Update
    accordingly.

    - patches/defauth-keyfile.patch, defauth-polkit, git-braillenote.patch,
      git-lsystemd.patch, git-manufacturer.patch, git-reproducible.patch,
      git-speech-crash.patch, git-vario-ultra-restart.patch, wait-polkit,
      xbrlapi-nospam.patch, xbrlapi-setfocus.patch, xbrlapi.patch: Remove
      patches, merged upstream.
    - patches/20-sbin.patch: update patch.
    - org.a11y.brltty.metainfo.xml, 60xbrlapi, xbrlapi.desktop: Remove files,
      merged upstream.
  * patches/api_startup.patch: Fix race between socket setup and select().
  * brltty-udeb.udev.rules: Update.

(Closes: Bug#837640)

This adds /etc/default/brltty with an option START_IN_INITRAMFS
which defaults to false.  If set to true, "update-initramfs -u" will create
an initrd which contains and starts brltty.
When the initscript is executed and there is an instance from initramfs
alive, it is restarted (necessary due to changed /).