apps/cmp: improve -reqin option to read fallback public key from firs… #1129

Job	Run time
run-checker (no-cmp)	8m 22s
run-checker (no-cms)	9m 9s
run-checker (no-dgram)	7m 6s
run-checker (no-dh)	8m 15s
run-checker (no-dtls)	8m 56s
run-checker (no-ec)	7m 51s
run-checker (no-ec2m)	9m 7s
run-checker (no-ecx)	11m 41s
run-checker (no-http)	10m 55s
run-checker (no-legacy)	8m 31s
run-checker (no-sock)	6m 44s
run-checker (enable-ssl-trace)	8m 34s
run-checker (no-threads)	8m 37s
run-checker (no-thread-pool)	7m 34s
run-checker (no-default-thread-pool)	8m 56s
run-checker (no-tls)	6m 27s
run-checker (no-tls1_2)	8m 18s
run-checker (no-tls1_3)	9m 41s
run-checker (enable-trace enable-fips)	9m 12s
run-checker (no-ui)	8m 25s
run-checker (no-quic)	7m 14s
	2h 59m 35s

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