Squashed 'src/machinetalk/proto/' changes from fbff940..ed880a4

ed880a4 machinetalk-protobuf: fixes in EMC status proto file

git-subtree-dir: src/machinetalk/proto
git-subtree-split: ed880a43d69bf8bec3672a4ce31768bf04bbd070
Merge commit '4f9a528c3a1e044faeaef547a2ace949f4ca5f66' into machinetalk-preview-strahlex