Add system tests and remove redundent logging from: 4801. [func] 'dnssec-lookaside auto;' and 'dnssec-lookaside . trust-anchor dlv.isc.org;' now elicit warnings rather than being fatal configuration errors. [RT #46410] (cherry picked from commit f5e1b555c59074e9b8626921c4a068ee6fc1c1e3)