Added extra log message on openssl 1.0.1e-fips bug.

If CRYPTO_set_mem_functions() fails, make a note on the openssl 1.0.1e-fips bug, so users may have a hint on the actual issue.
See more  #834.
Closes  #834.

modules/tls_mgm/tls_mgm.c

@@ -1274,6 +1274,9 @@ static int mod_init(void){
 	 */
 	if (!CRYPTO_set_mem_functions(os_malloc, os_realloc, os_free)) {
 		LM_ERR("unable to set the memory allocation functions\n");
+		LM_ERR("NOTE: check if you have openssl 1.0.1e-fips, as this "
+			"version is know to be broken; if so, you need to upgrade or "
+			"downgrade to a differen openssl version !!\n");
 		return -1;
 	}