Enable mod security by default

builtin/settingtypes.txt

@@ -1161,7 +1161,7 @@ mgvalleys_np_inter_valley_slope (Valley Slope) noise_params 0.5, 0.5, (128, 128,
 [*Security]
 
 #    Prevent mods from doing insecure things like running shell commands.
-secure.enable_security (Enable mod security) bool false
+secure.enable_security (Enable mod security) bool true
 
 #    Comma-separated list of trusted mods that are allowed to access insecure
 #    functions even when mod security is on (via request_insecure_environment()).

minetest.conf.example

@@ -1507,7 +1507,7 @@
 
 #    Prevent mods from doing insecure things like running shell commands.
 #    type: bool
-# secure.enable_security = false
+# secure.enable_security = true
 
 #    Comma-separated list of trusted mods that are allowed to access insecure
 #    functions even when mod security is on (via request_insecure_environment()).

src/defaultsettings.cpp

@@ -301,7 +301,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("emergequeue_limit_diskonly", "32");
 	settings->setDefault("emergequeue_limit_generate", "32");
 	settings->setDefault("num_emerge_threads", "1");
-	settings->setDefault("secure.enable_security", "false");
+	settings->setDefault("secure.enable_security", "true");
 	settings->setDefault("secure.trusted_mods", "");
 	settings->setDefault("secure.http_mods", "");