set log output locations per channel

[garfieldnate]

It would be nice to be able to specify that a log channel should be written to a file, or to stdout, stderr, etc.

Current command for writing all logs to a file:

output log log1.csv

It would be nice to be able to say:

output log log1.csv [<channel>, ...] 

[PLatCIC]

Right now this sort of works:

output log log1.csv

However, it puts the logs and a bunch of other stuff in that file. If I could specify a channel number in that command and only logs to that channel would go to the file, that would be great.