What is the purpose of this change?

Currently, readMetaDataForPath uses the default Depth=1 for PROPFIND requests. This returns a list of files. However, in the subsequent code, we only ever use result.Responses[0].

This PR changes the PROPFIND request in readMetaDataForPath to use Depth=0 to optimize performance. The improvement is very noticeable when a directory contains many files. The time for rclone ls is reduced by almost 50%.

Since readMetaDataForPath only uses the first response anyway, this change should be completely equivalent logically.

Was the change discussed in an issue or in the forum before?

Checklist

• I have read the contribution guidelines.
• I have added tests for all changes in this PR if appropriate.
• I have added documentation for the changes if appropriate.
• All commit messages are in house style.
• I'm done, this Pull Request is ready for review :-)