to avoid orca accumulating brlapi connections.

(Closes: Bug#893102)

    - debian/patches/api_startup.patch: Upstreamed.
    - debian/patches/git-07ecca2240c680373e9c2e5e38241edde9d1a677: Upstreamed.
    - debian/patches/brldefs-install.patch: Upstreamed.
    - debian/patches/git-ba42441d03c6145fe6859c90fb01b1fa16221a2f: Upstreamed.
    - debian/brltty-udeb.udev.rules: Add new device IDs.
    - debian/control: Add liblouis-dev build-dep.
    - debian/rules: Make brltty install appstream data.

Update to upstream version '5.6'
with Debian dir 27a6af72b3c4a2bffa1f74a4de796f42ddcb01a6

  * 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.

(Closes: Bug#869972).

(Closes: Bug#864670).

    - 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.