Automatically download missing maps.
To use the plugin simple change the level using rcon changelevel ... as normal, the plugin will detect when you're trying to load a non existing map and will automatically attempt to download the map before changing to it.
Additionally, you can pass a url to changelevel to download a map from a different location. Due to limitations with tf2 you do need to replace the :// in the url with :/: rcon changelevel https:/someserver.com/somemap.bsp.
You can control the location where it tries to download the map from by setting sm_map_download_base (defaults to 'https://fastdl.serveme.tf/maps')
The plugin looks for maps at ${sm_map_download_base}/${map_name}.bsp