This is to be used for non critical, non normal messages that don't break anything but need to be investigated by project admins.
Needed in the file_upload_handler to find hosts that reupload result files and investigate the reason.
Lets SCHED_MSG_LOG be used including only -lboinc, not -lsched.
This is a tactical move; SETI@home back-end code
uses SCHED_MSG_LOG and I need to make this work without -lsched,
which pulls in MySQL libraries which I don't want.