Added conversion logic for multiple id mapping snasphotter labels #109
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This PR add conversion logic for multiple id mapping snasphotter labels.
containerd/containerd#10722 introduces the multiple uid/gid mappings to containerd. The mapping entries are passed to snapshotters as labels in the format of
0:1000:1,1:110000:65536. Mappings are separated by,.But
fuse-overlayfsprogram requires mappings to be separated by:when passed as parameters.This conversion logic ensures the mappings are passed along in the correct format.