fixup! Make crypto.c compile/link with OpenSSL 3

Fix MD5 primitive initialization to avoid SIGBUS/SIGSEGV.

Author: ngie-eign

crypto.c

@@ -240,7 +240,7 @@ hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
     unsigned char* digest)
 {
 #ifdef	IS_OPENSSL3
-	EVP_MD		*md;
+	const EVP_MD	*md;
 	EVP_MD_CTX	*context;
 #else
 	MD5_CTX		context;
@@ -257,6 +257,9 @@ hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
 #ifdef	IS_OPENSSL3
 	context = EVP_MD_CTX_new();
 	assert(context != NULL);
+
+	md = EVP_md5();
+	assert(md != NULL);
 #endif
 
         /* if key is longer than 64 bytes reset it to key=MD5(key) */