Test loading a PEM file from multiple threads #633

Job	Run time
run-checker (enable-asan enable-ubsan no-shared no-asm -DOPENSSL_SMALL_FOOTPRINT)	3m 16s
run-checker (no-ct)	3m 50s
run-checker (no-dso)	4m 57s
run-checker (no-dynamic-engine)	3m 59s
run-checker (no-engine no-shared)	2m 20s
run-checker (no-err)	3m 54s
run-checker (no-filenames)	3m 57s
run-checker (enable-ubsan no-asm -DOPENSSL_SMALL_FOOTPRINT -fno-sanitize=alignment)	4m 37s
run-checker (no-module)	3m 52s
run-checker (no-ocsp)	3m 54s
run-checker (no-pinshared)	5m 30s
run-checker (no-srp)	3m 51s
run-checker (no-srtp)	3m 50s
run-checker (no-ts)	5m 8s
run-checker (enable-weak-ssl-ciphers)	3m 44s
run-checker (enable-zlib)	4m 3s
	1h 4m 42s

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