dnsdist: dump more packet cache

[phonedph1]

Idea from #14649

Short description

Include more readily accessible info from the packet cache.

Potentially need to change documentation to remove 'summary of the cache', or make the full packet stuff an optional argument.

Checklist

I have:

• read the CONTRIBUTING.md document
• compiled this code
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[coveralls]

Pull Request Test Coverage Report for Build 10975112632

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 1 of 8 (12.5%) changed or added relevant lines in 2 files are covered.
• 1187 unchanged lines in 20 files lost coverage.
• Overall coverage decreased (-0.04%) to 64.664%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pdns/dnsdistdist/dnsdist-lua-bindings-packetcache.cc	1	2	50.0%
pdns/dnsdistdist/dnsdist-cache.cc	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
pdns/recursordist/sortlist.cc	2	72.94%
pdns/distributor.hh	2	51.86%
pdns/libssl.cc	3	59.01%
pdns/rcpgenerator.cc	3	90.05%
pdns/misc.cc	3	63.26%
pdns/shuffle.cc	4	39.71%
pdns/dnsdistdist/dnsdist-carbon.cc	6	62.7%
pdns/recursordist/test-syncres_cc1.cc	8	89.55%
pdns/dnsdistdist/dnsdist-tcp.cc	8	75.79%
pdns/recursordist/rec_channel.cc	8	65.88%

Totals
Change from base Build 10793790851:	-0.04%
Covered Lines:	124772
Relevant Lines:	162218

---

💛 - Coveralls

[rgacogne]

CIFuzz is failing because it now needs the Base64Encode symbol, which means we need to dnsdist-crypto.cc dnsdist-crypto.hh to fuzz_target_dnsdistcache_SOURCES in Makefile.am.

[rgacogne]

Code looks good to me, thanks a lot! I would indeed prefer to make the full packet stuff optional. Please let me know if you want me to take care of that.

[phonedph1]

Code looks good to me, thanks a lot! I would indeed prefer to make the full packet stuff optional. Please let me know if you want me to take care of that.

I think I can in the next few days but if it's going to take you like 5 minutes feel free to just go for it :)

[rgacogne]

I think I can in the next few days but if it's going to take you like 5 minutes feel free to just go for it :)

I'm in no rush and happy to leave it to you :)

[phonedph1]

I'm in no rush and happy to leave it to you :)

I think it does what we want now :)

[Habbie]

i asked @phonedph1 to add an sdig hint to the doc before merge