[Tile-serving] [openstreetmap/mod_tile] Configurable ImageIO output format (#191)

[ǝɹʇʇɐʃǝ◖ xıʃǝɟ]

Love this! Can you rebase this on latest `master` and add some documentation around this?

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/mod_tile/pull/191#issuecomment-778857180
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tile-serving/attachments/20210214/753227cf/attachment.htm>