dnsdist: display if DNS over HTTP/3 is enabled or not in the configure report

[chbruyand]

Fix #13609

Short description

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)
• checked that this code was merged to master

[coveralls]

Pull Request Test Coverage Report for Build 7192580786

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 44 unchanged lines in 8 files lost coverage.
• Overall coverage increased (+0.02%) to 57.697%

---

Files with Coverage Reduction	New Missed Lines	%
modules/gpgsqlbackend/gpgsqlbackend.cc	1	88.62%
pdns/pollmplexer.cc	1	82.61%
pdns/tcpiohandler.cc	2	66.63%
modules/gpgsqlbackend/spgsql.cc	3	67.94%
pdns/recursordist/test-syncres_cc2.cc	3	88.99%
ext/luawrapper/include/LuaContext.hpp	8	13.76%
pdns/recursordist/test-syncres_cc1.cc	12	88.99%
modules/lmdbbackend/lmdbbackend.cc	14	72.36%

Totals
Change from base Build 7184070321:	0.02%
Covered Lines:	107594
Relevant Lines:	155150

---

💛 - Coveralls

[rgacogne]

👍 Thanks!