dns/dnsdbq: Upgrade to 2.6.7

2.6.5:

• remove RES_USEVC and RES_STAYOPEN, ignore non-TXT RRs in the answer section
• add '-T qdetail' to annotate JSON results with the query that generated them (for batching)
• initial cut at stsauver timeout and time display features
• remove -o from set of options since it is enumerated below
• Show qdetail transform in `$ ./dnsdbq -h' text
• Update README - CentOS 8 steps also works for AlmaLinux & Rocky Linux

2.6.6:

• add -C option to select a cookie jar file for libcurl
• display millisecond-granularity timestamps in logging and debugging
• Version 2.6.6, to restore sync between the tag's version and the version in globals.h

2.6.7:

• fix printf format problem on machines with long tv_usec; version 2.6.7

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