Before this change, undecryptable file names would be skipped very quietly
(there was a log warning, but only at DEBUG level),
failing to alert users of a potentially serious issue that needs attention.
After this change, the log level is raised to NOTICE by default and a new
--crypt-strict-names flag allows raising an error, for users who may prefer not
to proceed if such an issue is detected.
See https://forum.rclone.org/t/skipping-undecryptable-file-name-should-be-an-error/27115https://github.com/rclone/rclone/issues/5787
4c6d2c5410