extensions.md: Make note of the "new" priority system

[dconrad5]

Associated with gPodder PR gpodder/gpodder#1698

[elelay]

good to go once the change is merged in gpodder/gpodder

[auouymous]

This should mention symlinks. I don't know if shortcuts on Windows would work.

A user can symlink from their directory to the shared extension to change its priority, avoiding the need to copy the extension on each update. They can also symlink user/ 80_command_on_download.py and user/ 80_command_on_download_1.py to share/ 80_command_on_download.py to run two separate commands, changing the priority in them as needed.

[dconrad5]

This should mention symlinks. I don't know if shortcuts on Windows would work.

A user can symlink from their directory to the shared extension to change its priority, avoiding the need to copy the extension on each update. They can also symlink user/ 80_command_on_download.py and user/ 80_command_on_download_1.py to share/ 80_command_on_download.py to run two separate commands, changing the priority in them as needed.

Those are both good tricks I didn't even think of! Please see f9cfd14 and b267070.

[auouymous]

Thanks for implementing this feature.