Merge pull request #5988 from pieterlexis/api-tsig-keys

API: Add TSIG key manipulation endpoints

diff --cc pdns/Makefile.am
Simple merge

diff --cc pdns/pdnsutil.cc
Simple merge

diff --cc pdns/webserver.cc
Simple merge

diff --cc pdns/webserver.hh
Simple merge

diff --cc pdns/ws-auth.cc
Simple merge

diff --cc regression-tests.api/test_Zones.py
Simple merge

diff --cc regression-tests.api/test_helper.py
Simple merge