Merge pull request #288 from CESNET/v5.1.0 #175

Job	Run time
check / clang-checks	1m 40s
check / editor-config	6s
build-os-matrix	3s
make-tests (oraclelinux:9) / tests	1m 47s
rpm-build (oraclelinux:9) / rpm-build	5m 52s
build (oraclelinux:9) / build	2m 4s
rpm-install (oraclelinux:9) / rpm-install	1m 15s
	12m 47s

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