tx mode recognition fix #375

Job	Run time
quay.io/jdanek/cli-cpp_ubi8_epel (CMake)	33s
UBI 8 upstream (Bazel)	30s
UBI 8 EPEL (Bazel)	29s
quay.io/jdanek/cli-cpp_fedora37_epel (CMake)	40s
	2m 12s

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