Is it possible to configure the FileLogRoute? I am trying to debug a "clean template cache" task that gets stuck. However, it only happens intermittently, and whenever I notice any errors has already been rotated out of the log files. 

Is there a way to set the maxLogFiles of the FileLogRoute?  either through the config files, or through php code in a plugin?

(Setting $rotateByCopy to true would also be nice!)
Currently not without hacking the core files.

It's on our list to make log routing more configurable for Craft 3, though.