Xpra: Ticket #2556: rate limit xdg-menu packets

This packet sent at the start is getting close to 1MB, mostly because of all the icon data we send with each menu entry.

To fix:

Mon, 20 Jan 2020 08:01:16 GMT - Antoine Martin: status, description changed

Sat, 09 May 2020 04:44:01 GMT - Antoine Martin: priority changed

Important for slow connections, raising.

See also #2815.

Sun, 04 Oct 2020 12:54:59 GMT - Antoine Martin: milestone changed

Mon, 26 Oct 2020 12:35:04 GMT - Antoine Martin:

It actually broke through the 1MB barrier today and caused the client connection to drop!

Disconnecting client /run/xpra/localhost.localdomain-2:
 packet size requested is 1719771 but maximum allowed is 1048576

Mostly because of some humongous icons.

Sat, 23 Jan 2021 05:54:28 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2556