Merge branch 'master' into jgrpp

# Conflicts:
#	.github/workflows/ci-build.yml
#	.github/workflows/release-linux.yml
#	.github/workflows/release-macos.yml
#	.github/workflows/release-source.yml
#	.github/workflows/release.yml
#	CMakeLists.txt
#	COMPILING.md
#	src/ai/ai_core.cpp
#	src/ai/ai_gui.cpp
#	src/bridge_gui.cpp
#	src/company_gui.cpp
#	src/console_cmds.cpp
#	src/core/CMakeLists.txt
#	src/core/smallmap_type.hpp
#	src/disaster_vehicle.h
#	src/effectvehicle_base.h
#	src/fontcache.cpp
#	src/game/game_core.cpp
#	src/game/game_gui.cpp
#	src/gamelog.cpp
#	src/gamelog_internal.h
#	src/group_gui.cpp
#	src/linkgraph/linkgraph.h
#	src/misc.cpp
#	src/network/core/config.h
#	src/network/core/udp.cpp
#	src/network/network_chat_gui.cpp
#	src/network/network_content_gui.cpp
#	src/network/network_gui.cpp
#	src/newgrf.cpp
#	src/newgrf_gui.cpp
#	src/newgrf_profiling.cpp
#	src/newgrf_profiling.h
#	src/object_gui.cpp
#	src/openttd.cpp
#	src/openttd.h
#	src/order_gui.cpp
#	src/os/windows/font_win32.cpp
#	src/rail_gui.cpp
#	src/road.cpp
#	src/road_gui.cpp
#	src/saveload/afterload.cpp
#	src/saveload/saveload.h
#	src/script/api/script_controller.cpp
#	src/script/api/script_roadtypelist.cpp
#	src/script/script_config.cpp
#	src/script/script_config.hpp
#	src/script/script_instance.cpp
#	src/script/script_scanner.cpp
#	src/script/squirrel.cpp
#	src/script/squirrel_helper.hpp
#	src/settings_gui.cpp
#	src/settings_internal.h
#	src/settings_type.h
#	src/table/settings/network_private_settings.ini
#	src/timetable_gui.cpp
#	src/vehicle.cpp
#	src/vehicle_base.h
#	src/window_gui.h

src/script/squirrel.hpp

@@ -84,13 +84,13 @@ public:
 	 * @param script The full script-name to load.
 	 * @return False if loading failed.
 	 */
-	bool LoadScript(const char *script);
-	bool LoadScript(HSQUIRRELVM vm, const char *script, bool in_root = true);
+	bool LoadScript(const std::string &script);
+	bool LoadScript(HSQUIRRELVM vm, const std::string &script, bool in_root = true);
 
 	/**
 	 * Load a file to a given VM.
 	 */
-	SQRESULT LoadFile(HSQUIRRELVM vm, const char *filename, SQBool printerror);
+	SQRESULT LoadFile(HSQUIRRELVM vm, const std::string &filename, SQBool printerror);
 
 	/**
 	 * Adds a function to the stack. Depending on the current state this means
@@ -159,7 +159,7 @@ public:
 	 */
 	bool CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT *ret, int suspend);
 	bool CallMethod(HSQOBJECT instance, const char *method_name, int suspend) { return this->CallMethod(instance, method_name, nullptr, suspend); }
-	bool CallStringMethodStrdup(HSQOBJECT instance, const char *method_name, const char **res, int suspend);
+	bool CallStringMethod(HSQOBJECT instance, const char *method_name, std::string *res, int suspend);
 	bool CallIntegerMethod(HSQOBJECT instance, const char *method_name, int *res, int suspend);
 	bool CallBoolMethod(HSQOBJECT instance, const char *method_name, bool *res, int suspend);
 
@@ -178,12 +178,12 @@ public:
 	 * @param prepend_API_name Optional parameter; if true, the class_name is prefixed with the current API name.
 	 * @return False if creating failed.
 	 */
-	static bool CreateClassInstanceVM(HSQUIRRELVM vm, const char *class_name, void *real_instance, HSQOBJECT *instance, SQRELEASEHOOK release_hook, bool prepend_API_name = false);
+	static bool CreateClassInstanceVM(HSQUIRRELVM vm, const std::string &class_name, void *real_instance, HSQOBJECT *instance, SQRELEASEHOOK release_hook, bool prepend_API_name = false);
 
 	/**
 	 * Exactly the same as CreateClassInstanceVM, only callable without instance of Squirrel.
 	 */
-	bool CreateClassInstance(const char *class_name, void *real_instance, HSQOBJECT *instance);
+	bool CreateClassInstance(const std::string &class_name, void *real_instance, HSQOBJECT *instance);
 
 	/**
 	 * Get the real-instance pointer.
@@ -233,7 +233,7 @@ public:
 	/**
 	 * Throw a Squirrel error that will be nicely displayed to the user.
 	 */
-	void ThrowError(const char *error) { sq_throwerror(this->vm, error); }
+	void ThrowError(const std::string_view error) { sq_throwerror(this->vm, error); }
 
 	/**
 	 * Release a SQ object.