Rename SSL certificate bundle setting to clarify the "overriding" aspect

This closes https://github.com/godotengine/godot-docs/issues/2531.

core/register_core_types.cpp

@@ -233,8 +233,8 @@ void register_core_settings() {
 	GLOBAL_DEF_RST("network/limits/packet_peer_stream/max_buffer_po2", (16));
 	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/packet_peer_stream/max_buffer_po2", PropertyInfo(Variant::INT, "network/limits/packet_peer_stream/max_buffer_po2", PROPERTY_HINT_RANGE, "0,64,1,or_greater"));
 
-	GLOBAL_DEF("network/ssl/certificates", "");
-	ProjectSettings::get_singleton()->set_custom_property_info("network/ssl/certificates", PropertyInfo(Variant::STRING, "network/ssl/certificates", PROPERTY_HINT_FILE, "*.crt"));
+	GLOBAL_DEF("network/ssl/certificate_bundle_override", "");
+	ProjectSettings::get_singleton()->set_custom_property_info("network/ssl/certificate_bundle_override", PropertyInfo(Variant::STRING, "network/ssl/certificate_bundle_override", PROPERTY_HINT_FILE, "*.crt"));
 }
 
 void register_core_singletons() {

doc/classes/ProjectSettings.xml

@@ -874,8 +874,9 @@
 		<member name="network/remote_fs/page_size" type="int" setter="" getter="" default="65536">
 			Page size used by remote filesystem (in bytes).
 		</member>
-		<member name="network/ssl/certificates" type="String" setter="" getter="" default="&quot;&quot;">
-			CA certificates bundle to use for SSL connections. If not defined, Godot's internal CA certificates are used.
+		<member name="network/ssl/certificate_bundle_override" type="String" setter="" getter="" default="&quot;&quot;">
+			The CA certificates bundle to use for SSL connections. If this is set to a non-empty value, this will [i]override[/i] Godot's default [url=https://github.com/godotengine/godot/blob/master/thirdparty/certs/ca-certificates.crt]Mozilla certificate bundle[/url]. If left empty, the default certificate bundle will be used.
+			If in doubt, leave this setting empty.
 		</member>
 		<member name="node/name_casing" type="int" setter="" getter="" default="0">
 			When creating node names automatically, set the type of casing in this project. This is mostly an editor setting.

main/main.cpp

@@ -2011,7 +2011,7 @@ bool Main::start() {
 		if (!project_manager && !editor) { // game
 
 			// Load SSL Certificates from Project Settings (or builtin).
-			Crypto::load_default_certificates(GLOBAL_DEF("network/ssl/certificates", ""));
+			Crypto::load_default_certificates(GLOBAL_DEF("network/ssl/certificate_bundle_override", ""));
 
 			if (game_path != "") {
 				Node *scene = nullptr;