Allow larger asset files

[hecktest]

Issue type

Half bug half request

Minetest version

any

OS / Hardware

any

Summary

Minetest will currently refuse to accept asset files above a certain magical amount of bytes, defined by the MAX_RELIABLE_WINDOW_SIZE constant. I suppose this is related to sending files over the network, but it pops up in single player as well.
Minetest also seems not to compress assets before comparing them with said number (or at all, which would be very bad), making the limit very easy to hit with animated model files.
The solution, of course, is to compress files and send them in pieces if they still exceed the window size. (most assets will not hit both limits, but certain animated player models are a possibility)

[Calinou]

Based on the issue description, this can be worked around by setting up a remote media server (essentially an HTTP server used by clients to download assets).

[hecktest]

No, that is irrelevant to this issue.

[rubenwardy]

The best fix would be fragmentation, ideally with compression, as said

No, that is irrelevant to this issue.

It is relevant as it will bypass this issue by loading the media over HTTP instead. It's not a good solution though, and means it would only really work on a server