CMP app and API doc: add note on critical server auth on receiving tr… #1238

Job	Run time
run-checker (enable-asan enable-ubsan no-shared no-asm -DOPENSSL_SMALL_FOOTPRINT)	15m 3s
run-checker (no-dgram)	8m 6s
run-checker (no-dso)	7m 29s
run-checker (no-dynamic-engine)	6m 17s
run-checker (no-engine no-shared)	5m 9s
run-checker (no-err)	6m 18s
run-checker (no-filenames)	7m 41s
run-checker (enable-ubsan no-asm -DOPENSSL_SMALL_FOOTPRINT -fno-sanitize=alignment)	14m 7s
run-checker (no-unit-test)	6m 17s
run-checker (enable-weak-ssl-ciphers)	8m 10s
run-checker (enable-zlib)	6m 35s
	1h 31m 12s

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