--max-transfer - add new exit code (10)

It adds dedicated exit code (10) for --max-duration flag.

Rclone will exit with exit code 10 if the duration limit is reached.

It behaves in similar fashion as --max-transfer and exit code 8.

discussed on the forum:

https://forum.rclone.org/t/max-duration-option-is-triggering-exit-with-error/39917/6
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f