This is possible now that we no longer support go1.12 and brings
rclone into line with standard practices in the Go world.
This also removes errors.New and errors.Errorf from lib/errors and
prefers the stdlib errors package over lib/errors.
Without this patch the resulting error is first converted to string and then recreated.
This makes it impossible to use the defined error types to figure out the cause of the error,
and may result in invalid HTTP status codes.
This patch adds a test TestExecuteJobErrorPropagation to validate that the errors are
properly propagated.
See: https://forum.rclone.org/t/rc-rc-job-expire-interval-bug/11188
rclone was ignoring the --rc-job-expire-duration and --rc-job-interval
flags. This turned out to be an initialization order problem and was
fixed by moving those flags out of global config into rc config.
Introduce stats groups that will isolate accounting for logically
different transferring operations. That way multiple accounting
operations can be done in parallel without interfering with each other
stats.
Using groups is optional. There is dedicated global stats that will be
used by default if no group is specified. This is operating mode for CLI
usage which is just fire and forget operation.
For running rclone as rc http server each request will create it's own
group. Also there is an option to specify your own group.
