docs: link to doc:pdnsutil

[jsoref]

Short description

link to doc:pdnsutil

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 13445488916

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 65 unchanged lines in 12 files lost coverage.
• Overall coverage increased (+3.8%) to 64.49%

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Files with Coverage Reduction	New Missed Lines	%
modules/gpgsqlbackend/gpgsqlbackend.cc	1	88.62%
pdns/backends/gsql/gsqlbackend.hh	1	97.71%
pdns/recursordist/syncres.cc	1	80.36%
pdns/signingpipe.cc	1	85.52%
ext/json11/json11.cpp	2	62.72%
pdns/misc.cc	4	62.46%
pdns/recursordist/rec-tcp.cc	4	64.73%
pdns/dnsdistdist/dnsdist-carbon.cc	6	61.7%
pdns/recursordist/rec-tcpout.cc	6	50.79%
pdns/recursordist/test-syncres_cc1.cc	6	89.41%

Totals
Change from base Build 13433765276:	3.8%
Covered Lines:	127620
Relevant Lines:	166906

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💛 - Coveralls