v0.3.7

[eafer]

This is a small release that fixes the dkms build, recently broken by
the implementation of version reporting. From now on I will run a dkms
build before each new tag.

The release also lifts the ban on filesystems with half-written backup
superblocks, a problem that some users appear to have encountered
already.

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This discussion was created from the release v0.3.7.