* Allow _C- for raw/commissioning frames
 * Remove an '+' that was left in when converting from string concatenation to path joins.

 * Convert to using os.path instead of manual path creation
 * Estimate the number of TB of data per day and use that as a default amount of free space to hold to.

This is the python3 script used at LHO for frame wipping.  Moving it from userapps to the advligorts repository.

This script is responsible for running every hour and freeing up space on the disk system for new frames.