[MapProxy] Cleanups

[Petróczki Imre]

Hi all,

I have some questions about cleanups:
- if i use the remove_before parameter then MapProxy deletes those
tiles which are created before the given day? is it correct? Is there
any way to delete the tiles by the last reading date? I mean, those
tiles will be deleted which are displayed the longest time ago.
- if i want to specify a time for the remove_before, what are the
acceptable formats?

Thanks for help!

Imre Petróczki