Merge pull request #299 from CESNET/v5.3.0 #243

Job	Run time
check / editor-config	10s
check / clang-checks	1m 38s
build-os-matrix	2s
make-tests (oraclelinux:9) / tests	1m 45s
build (oraclelinux:9) / build	1m 59s
rpm-build (oraclelinux:9) / rpm-build	5m 52s
rpm-install (oraclelinux:9) / rpm-install	1m 15s
ipfix-elements-check / ipfix-elements-checks	42s
	13m 23s

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