Low-severity hardening, input validation, memory safety, and zeroization fixes #2431

Job	Run time
discover_versions / Resolve wolfSSL + OpenSSL refs	12s
Simple Test (v5.9.2-stable, openssl-3.6.3, --replace-default --enable-replace-default-testing)	46s
Simple Test (v5.9.2-stable, openssl-3.0.17)	1m 27s
Simple Test (master, openssl-3.6.3, --replace-default --enable-replace-default-testing)	2m 29s
Simple Test (v5.8.4-stable, openssl-3.6.3)	1m 10s
Simple Test (v5.8.4-stable, openssl-3.6.3, --replace-default --enable-replace-default-testing)	1m 22s
Simple Test (master, openssl-3.6.3)	2m 25s
Simple Test (v5.8.4-stable, openssl-3.0.17)	1m 58s
Simple Test (v5.8.4-stable, openssl-3.0.17, --replace-default --enable-replace-default-testing)	51s
Simple Test (master, openssl-3.0.17)	1m 56s
Simple Test (v5.9.2-stable, openssl-3.0.17, --replace-default --enable-replace-default-testing)	1m 6s
Simple Test (v5.9.2-stable, openssl-3.6.3)	43s
Simple Test (master, openssl-3.0.17, --replace-default --enable-replace-default-testing)	2m 9s
	18m 34s

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