Xpra: Ticket #2566: make it easier to download the server log

The server knows the path to the log file and we have file-transfers capabilities.

Mon, 27 Jan 2020 09:41:11 GMT - Antoine Martin: status changed; resolution set

status changed from new to closed
resolution set to fixed

Done:

r25092: expose server log path in session
r25094: add tray menu option to download the server log file

Sun, 02 Feb 2020 06:55:53 GMT - Antoine Martin:

Follow up: #2570

Sat, 23 Jan 2021 05:54:47 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2566