msi: A file that does not have the msidbFileAttributesCompressed bit set should be considered non-compressed.

Don't delete the progid key when unregistering coclasses - this is now 
done in unregister_progids.

This allows writing multiple progids that refer to one class.
Support writing out Version and VersionIndependentProgId keys for classes.

Update LsaQueryInformationPolicy to use correct computer name and SID.
Add support for PolicyDnsDomainInformation.