Update the libFuzzer support and run fuzzed inputs on normal make check in Gitlab CI

• Add better support for LLVM libFuzzer packet parser tests
• Create and test the default corpus for packet parser when run without libFuzzer

changed milestone to %next

added ~7 security ~28 labels

added 46 commits

• eb7fc0d5...d65f2419 - 43 commits from branch master
• a5001ef7 - Improve the sanitizer autoconf macros to automatically enable coverage for…
• eaf632fa - Add better support for LLVM libFuzzer packet parser tests + create and test the…
• ff62064a - Add simple zscanner fuzzer

Compare with previous version

Ok, so I have removed the tests cases from this repository and moved them to the https://gitlab.labs.nic.cz/knot/fuzzing/ subproject + .gitlab-ci.yml now know it has to checkout the submodules for tests to be useful.

added 6 commits

• 9a35768f...03c53dea - 2 commits from branch master
• 4d238b4c - Improve the sanitizer autoconf macros to automatically enable coverage for…
• baa7a768 - Automatically checkout the submodules when doing GitLab CI builds
• daaef7c7 - Add better support for LLVM libFuzzer packet parser tests
• 0a96e52c - Add simple zscanner fuzzer

Compare with previous version

changed title from Update the libFuzzer support and run fuzzed inputs on normal make check to Update the libFuzzer support and run fuzzed inputs on normal make check in Gitlab CI

changed the description

added 4 commits

• f0948de5 - Improve the sanitizer autoconf macros to automatically enable coverage for…
• 3193ab7c - Automatically checkout the submodules when doing GitLab CI builds
• fe1454bb - Add better support for LLVM libFuzzer packet parser tests
• 014540a0 - Add simple zscanner fuzzer

Compare with previous version

merged

mentioned in commit 09bfc191