update of cfv (checksum tool)
There is a more recent version of the tool cfv
available than the included.
It doesn't give these deprecation warnings anymore:
/usr/bin/cfv:670: DeprecationWarning: the sha module is deprecated; use the hashlib module instead
/usr/bin/cfv:699: DeprecationWarning: the md5 module is deprecated; use hashlib instead
Doesn't need any compiling, simply replace the cfv file itself.