Update to upstream version '5.0.0+dfsg.1'
with Debian dir 0971e36b12a20dffb401708d933ef8da21711806

  - Carrying patchs 0001-* and 0003-* yet to be merged upstream
    from 4.8.8.
  - Move location of added help_web.html, the original
    destination dir is gone.
  - Fix some broken include paths, to be upstreamed.
  - Relicense appstream metadata to overall GPL-2+ license.
  - Move opencpn.appdata.xml to new location metainfo
  - Clean up rules after upstream fixes and patches

Bug: https://github.com/OpenCPN/OpenCPN/issues/1166

testing overrides

more testing