rec: prep for rec-5.2.0-rc1

[omoerbeek]

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 12313833560

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 81 unchanged lines in 16 files lost coverage.
• Overall coverage decreased (-0.02%) to 64.754%

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Files with Coverage Reduction	New Missed Lines	%
ext/json11/json11.cpp	1	64.49%
pdns/dnsdistdist/dnsdist-backend.cc	1	66.73%
pdns/recursordist/negcache.hh	2	88.24%
pdns/misc.cc	2	64.79%
pdns/backends/gsql/gsqlbackend.hh	2	97.14%
modules/lmdbbackend/lmdbbackend.cc	2	72.54%
pdns/tsigverifier.cc	3	77.22%
pdns/opensslsigners.cc	3	61.2%
pdns/recursordist/pdns_recursor.cc	3	72.74%
pdns/recursordist/test-syncres_cc1.cc	6	89.66%

Totals
Change from base Build 12312513806:	-0.02%
Covered Lines:	125886
Relevant Lines:	163531

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💛 - Coveralls