pycardium: check file-blacklist in os.unlink and os.rename, too
also, (awkwardly) attempt to find a header file in pycardium to put the filename_restricted
function into.
Also: hanged the error return from EPERM to EACCESS
also, (awkwardly) attempt to find a header file in pycardium to put the filename_restricted
function into.
Also: hanged the error return from EPERM to EACCESS