rsync-tls - fails to sync if many files in the root of the source PVC

[tesshuflower]

Describe the bug

Rsync-tls uses globbing to get the file list to send to the destination, both these cmds can fail with Arguments list too long error if there are too many files (or filenames too long) for files/directories in the root directory of the source PVC.

volsync/mover-rsync-tls/client.sh

Line 153 in efd604e

if [[ -n "$(ls -A -- ${SOURCE}/*)" ]]; then

/mover-rsync-tls/client.sh: line 115: /usr/bin/ls: Argument list too long

Which can manifest in the client script thinking there are no files to sync

and

volsync/mover-rsync-tls/client.sh

Line 155 in efd604e

rsync -aAhHSxz --exclude=lost+found --itemize-changes --info=stats2,misc2 ${SOURCE}/* rsync://127.0.0.1:$STUNNEL_LISTEN_PORT/data

Can produce the error:

/mover-rsync-tls/client.sh: line 117: /usr/bin/rsync: Argument list too long

which will result in the sync failing and repeatedly retrying.

The above log statements were taken from a v0.8.1 build.

Steps to reproduce

Expected behavior

Actual results

Additional context