Revert "tests-extra: Disabled TSIG in restart tests."

This reverts commit 7926784dd0e95f85c6b43a4300fc7b8a60e0ead4.
ddns: skip processing if all updates fail.
tests-extra: Added test for TSIG with DDNS and uppercase.
ddns: Preserve qname case when storing DDNS requests.

- Made some functions from process_query.c public to achieve this.
- Also, if I did not lowercase the qname again before processing,
  updates fail on case comparison - this might be due to packet
compression.
Merge remote-tracking branch 'origin/master' into ddns-uppercase-tsig
Merge remote-tracking branch 'origin' into ddns-uppercase-tsig
tests-extra: Deleted duplicated test case.
Merge remote-tracking branch 'origin' into ddns-uppercase-tsig
ddns: Send responses to updates that failed ACL/TSIG right away.
ddns: added request data freeing function.
Merge branch 'ddns-uppercase-tsig' into 'master'

Ddns uppercase tsig

See merge request !268
tests-extra: corrected b104959
ddns: store DDNS q size during reload
bumped version to 1.5.1, updated NEWS
doc: fix minimal configuration description
tests-extra: Disable DNSSEC in zone/restart
Standardize log messages and fix some typos
log: Fixed some logging messages
log: removed uppercase
Merge branch 'log-msg-cleanup' into 'master'

Log msg cleanup

See merge request !271