webdav4: migrate to new library

[skshetry]

Here's the fetch speed comparison between the two libraries:

webdavclient3

webdav4

TODO:

• Test ask_password still works
• Test token auth works.
• Test auth still works when the URL contains a username.
• Test external remote case.
• Test that it works if the server is accessed through a port.
• Test that it works if the server is behind a path (i.e. not in root URL).
• Test with Owncloud, NextCloud, and Yandex.
• Test with certs.

Additionally, while we are at it, it'd be great to support:

• Retry mechanism on upload
• Retry/reconnect mechanism on file obj using range (Make it more robust skshetry/webdav4#4)
• verify certs (see http/webdav: support specifying custom certs in ssl_verify #6142)

Thank you for the contribution - we'll try to review it as soon as possible. 🙏

[efiop]

Here's the fetch speed comparison between the two libraries:

@skshetry x100 faster? 😮 If so, could you elaborate on key differences that allowed you to achieve that?

[skshetry]

Here's the fetch speed comparison between the two libraries:

@skshetry x100 faster? If so, could you elaborate on key differences that allowed you to achieve that?

https://github.com/ezhov-evgeny/webdav-client-python-3/blob/09ae1414ddd331775686ebe55a625e732ef78b14/webdav3/client.py#L337

This has been recently fixed, but not released so far. Just a humblebrag. 😄

[efiop]

For the record: discussed and decided to merge as-is and the leftover TODOs will be handled in the follow-up. Thank you @skshetry 🙏