This triggers a stack buffer overflow bug in send_fileset. The
problem is that dird/fd_cmds.c includes findlib/find.h, which contains a
definition of MAX_FOPTS:

Thanks to Larry and Martin.

Warning: xattr maximum length 182 is greater than MaximumNetworkBufferSize on file ...

The procedure to sort the Storage resource list with the number of concurrent
jobs was incorrectly done, leading to not select the "least used" resource.