(oops) Apologies all, that last header-cleanup commit was from the wrong

tree. This further reduces header interdependencies, and makes some
associated cleanups.

crypto/dsa/dsa_lib.c

@@ -66,6 +66,7 @@
 #ifndef OPENSSL_NO_ENGINE
 #include <openssl/engine.h>
 #endif
+#include <openssl/dh.h>
 
 const char *DSA_version="DSA" OPENSSL_VERSION_PTEXT;