Ensure local mount path exists

[tigattack]

Adds a task to ensure the local mount path exists with optionally configurable mode, owner, and group.

[tigattack]

Should this new task respect the state of rclone_mkdir? I think not, since I can't envisage a scenario where a user would not wish for the local mount path to exist, but can imagine some users may wish to be more stringent when it comes to performing actions on the remote filesystem (hence why rclone_mkdir exists, I suppose).

Open to thoughts/discussion.

[stefangweichinger]

@tigattack thanks for your PRs. Pls allow me some time until I can look into and think about them. Busy days here ;-)

[stefangweichinger]

sorry for being so late here. busy times

[stefangweichinger]

I have no specific opinion here. I like the enhancement and tend to merge it to get the PR closed at last (my fault).
I assume you, @tigattack use your patched version since filing this PR ... so it's "tested" already.

A new release to galaxy needs a tag anyway, I might wait with tagging until I am through the other PRs.

[tigattack]

No problem, I understand! Indeed, I have been using my patch and it seems to be working great.