I'm thinking this should be closed because the compile problem can be
worked around with "./config no-async". "./config no-async" worked on
both CentOS 5 and BSD 5.7 (both lack the headers).
I suppose it can be kept open if someone feels Configure should
auto-detect the feature. I'm in this camp
Bump... Still present in 270862b470d43a28.
cc -DDSO_DLFCN -DHAVE_DLFCN_H -DOPENSSL_THREADS
-DOPENSSL_NO_DYNAMIC_ENGINE -DOPENSSL_PIC -DOPENSSL_IA32_SSE2
-DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m
-DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM