Map DNS_R_BADTSIG to FORMERR

Mark Andrews requested to merge marka-DNS_R_BADTSIG-map-to-FORMERR into main

The more specific error code for TSIG out of place on a query was not being mapped to FORMERR.

https://support.isc.org/Ticket/Display.html?id=16828

Now that the log message has been printed set the result code to DNS_R_FORMERR. We don't do this via dns_result_torcode() as we don't want upstream errors to produce FORMERR if that processing end with DNS_R_BADTSIG.

Edited by Mark Andrews

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