* digdelv test was just expecting default server EDNS buffer size to be
  4096, the test needed only slight adjustment

(cherry picked from commit f1556f8c)

(cherry picked from commit 3fe7fa3d)

such addresses broke some YAML parsers.

(cherry picked from commit a8baf79e)

(cherry picked from commit 0ec77c2b)

(cherry picked from commit e6b0153f)

Additionally check that "delete $qname SOA" in the update
reponse doesn't trigger a insertion in nslookup.

(cherry picked from commit 6593cf0b)

(cherry picked from commit a81ae32d)

Mark Andrews authored Nov 18, 2019 and Ondřej Surý committed Nov 26, 2019

The indentation for dumping the master zone was driven by two
global variables dns_master_indent and dns_master_indentstr.  In
threaded mode, this becomes prone to data access races, so this commit
converts the global variables into a local per-context tuple that
consist of count and string.

Portion of the digdelv test are skipped on IPv6 due to extra quotes
around $TESTSOCK6: "I:digdelv:IPv6 unavailable; skipping".

Researched by @michal.

Regressed with 351efd88.

also incidentally added several missing ret=0 statements,
and removed some duplicates.

The BusyBox version of sed treats leading '\+' in a regular expression
to be matched as a syntax error ("Repetition not preceded by valid
expression"), which triggers false positives for the "digdelv" system
test.  Make the relevant sed invocations work portably across all sed
implementations by removing the leading backslash.

Matthijs Mekking authored Apr 05, 2019 and Mark Andrews committed Apr 10, 2019

This also fixes a bug in the tests ($n was not incremented in one
place).

Michał Kępień authored Jan 18, 2019 and Evan Hunt committed Jan 24, 2019

dig retries a TCP query when a server closes the connection prematurely.
However, dig's exit code remains unaffected even if the second attempt
to get a response also fails with the same error for the same lookup,
which should not be the case.  Ensure the exit code is updated
appropriately when a retry triggered by a TCP EOF condition fails.

This reverts commit 4af9f971, reversing
changes made to 0289f3f2.

The output of certain "dig +idnout" invocations may be locale-dependent.
Remove the "dig +idnout" subtest from the "digdelv" system test as IDN
support is already thoroughly tested by the "idna" system test.

- add CHANGES note
- update copyrights and license headers
- add -j to the make commands in .gitlab-ci.yml to take
  advantage of parallelization in the gitlab CI process