openssl: remove all uses of USE_SSLEAY

SSLeay was the name of the library that was subsequently turned into
OpenSSL many moons ago (1999). curl does not work with the old SSLeay
library since years. This is now reflected by only using USE_OPENSSL in
code that depends on OpenSSL.

lib/curl_ntlm_core.c

@@ -33,7 +33,7 @@
 
 #if !defined(USE_WINDOWS_SSPI) || defined(USE_WIN32_CRYPTO)
 
-#ifdef USE_SSLEAY
+#ifdef USE_OPENSSL
 
 #  ifdef USE_OPENSSL
 #    include <openssl/des.h>
@@ -132,7 +132,7 @@ static void extend_key_56_to_64(const unsigned char *key_56, char *key)
   key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
 }
 
-#ifdef USE_SSLEAY
+#ifdef USE_OPENSSL
 /*
  * Turns a 56 bit key into the 64 bit, odd parity key and sets the key.  The
  * key schedule ks is also set.
@@ -366,7 +366,7 @@ void Curl_ntlm_core_lm_resp(const unsigned char *keys,
                             const unsigned char *plaintext,
                             unsigned char *results)
 {
-#ifdef USE_SSLEAY
+#ifdef USE_OPENSSL
   DES_key_schedule ks;
 
   setup_des_key(keys, DESKEY(ks));
@@ -441,7 +441,7 @@ CURLcode Curl_ntlm_core_mk_lm_hash(struct SessionHandle *data,
   {
     /* Create LanManager hashed password. */
 
-#ifdef USE_SSLEAY
+#ifdef USE_OPENSSL
     DES_key_schedule ks;
 
     setup_des_key(pw, DESKEY(ks));
@@ -532,7 +532,7 @@ CURLcode Curl_ntlm_core_mk_nt_hash(struct SessionHandle *data,
 
   {
     /* Create NT hashed password. */
-#ifdef USE_SSLEAY
+#ifdef USE_OPENSSL
     MD4_CTX MD4pw;
     MD4_Init(&MD4pw);
     MD4_Update(&MD4pw, pw, 2 * len);