rsync handler: allow whitespace in include line of local source

Open Andrew Bezella requested to merge ko7ashiV/backupninja:feature/issues-9806 into master

a lot of it is quoting to match shellcheck's recommendations and there's likely a better way to break the include into SECTIONs. but this is relatively low impact and it works in the cases i tested. note that this does not address a remote source. Closes #9806 (closed)

Edited by Andrew Bezella

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