MDEV-35838 libressl support differences in CRYPTO_set_mem_functions

Based on FreeBSD patch.

The FreeBSD inclusion of check_openssl_compatibility prevented
any use of the crypto callbacks and as such the later differences
where ignored.

The later differences in coc_malloc didn't propegate to the other
callback functions of CRYPTO_set_mem_functions where a reduced
argument list also applied.

Looking where[2] libressl added the functions it was of the
same prototype 10 years ago so omitting any version check.

[1] https://github.com/freebsd/freebsd-ports/blob/a34cf9c2dbf503c8248371ba3bab24f34d2d045d/databases/mariadb106-server/files/patch-mysys__ssl_openssl.c
[2] libressl/openbsd@5ebad8a#diff-7f393e5489e6c5780773408f11ca27d9b3bb8f55b174631a1e9467a1dd3010b9R22

Author: grooverdan

mysys_ssl/openssl.c

@@ -36,8 +36,12 @@ int check_openssl_compatibility()
 static uint testing;
 static size_t alloc_size, alloc_count;
 
-static void *coc_malloc(size_t size, const char *f __attribute__((unused)),
-                                             int l __attribute__((unused)))
+static void *coc_malloc(size_t size
+#ifndef LIBRESSL_VERSION_NUMBER
+                        , const char *f __attribute__((unused)),
+                        int l __attribute__((unused))
+#endif
+)
 {
   if (unlikely(testing))
   {
@@ -47,15 +51,22 @@ static void *coc_malloc(size_t size, const char *f __attribute__((unused)),
   return malloc(size);
 }
 
-static void *coc_realloc(void *addr, size_t num,
-                         const char *file __attribute__((unused)),
-                         int line __attribute__((unused)))
+static void *coc_realloc(void *addr, size_t num
+#ifndef LIBRESSL_VERSION_NUMBER
+                         , const char *file __attribute__((unused)),
+                         int line __attribute__((unused))
+#endif
+)
 {
   return realloc(addr, num);
 }
 
-static void coc_free(void *addr, const char *file __attribute__((unused)),
-                    int line __attribute__((unused)))
+static void coc_free(void *addr
+#ifndef LIBRESSL_VERSION_NUMBER
+                     , const char *file __attribute__((unused)),
+                     int line __attribute__((unused))
+#endif
+)
 {
   free(addr);
 }