redirect API log output to separate log file

[TheFriendlyCoder]

Currently, all log output generated by the FShell API and any derived classes, including output generated by the log methods on the logger mixin class, are output to the same log file. What I'd like to see is all of the debug output generated by the base class APIs directed to one log file, while output generated by the logger mixin class and any derived classes should be redirected to an alternate log file instead.