Merge branch 'master' into jgrpp

# Conflicts:
#	.github/workflows/ci-build.yml
#	.github/workflows/codeql.yml
#	.github/workflows/commit-checker.yml
#	.github/workflows/release-linux-legacy.yml
#	.github/workflows/release-linux.yml
#	.github/workflows/release-macos.yml
#	.github/workflows/release-windows-store.yml
#	.github/workflows/release-windows.yml
#	.github/workflows/upload-cdn.yml
#	.github/workflows/upload-gog.yml
#	.github/workflows/upload-steam.yml
#	src/console_cmds.cpp
#	src/core/math_func.hpp
#	src/fios.cpp
#	src/fios.h
#	src/intro_gui.cpp
#	src/network/network_server.cpp
#	src/openttd.cpp
#	src/settings.cpp
#	src/settings_gui.cpp
#	src/settings_internal.h
#	src/settings_table.cpp
#	src/settings_type.h
#	src/table/settings.h.preamble
#	src/table/settings/company_settings.ini
#	src/table/settings/currency_settings.ini
#	src/table/settings/difficulty_settings.ini
#	src/table/settings/economy_settings.ini
#	src/table/settings/game_settings.ini
#	src/table/settings/gui_settings.ini
#	src/table/settings/linkgraph_settings.ini
#	src/table/settings/locale_settings.ini
#	src/table/settings/misc_settings.ini
#	src/table/settings/multimedia_settings.ini
#	src/table/settings/network_private_settings.ini
#	src/table/settings/network_settings.ini
#	src/table/settings/news_display_settings.ini
#	src/table/settings/old_gameopt_settings.ini
#	src/table/settings/pathfinding_settings.ini
#	src/table/settings/script_settings.ini
#	src/table/settings/win32_settings.ini
#	src/table/settings/window_settings.ini
#	src/table/settings/world_settings.ini
#	src/viewport.cpp
#	src/viewport_func.h
#	src/window.cpp

docs/openttd.6

@@ -13,7 +13,7 @@
 .Op Fl c Ar config_file
 .Op Fl d Op Ar level | Ar cat Ns = Ns Ar lvl Ns Op , Ns Ar ...
 .Op Fl D Oo Ar host Oc Ns Op : Ns Ar port
-.Op Fl g Op Ar savegame
+.Op Fl g Op Ar file
 .Op Fl G Ar seed
 .Op Fl I Ar graphicsset
 .Op Fl m Ar driver
@@ -62,11 +62,11 @@ Start in world editor mode.
 .It Fl f
 Fork into background (dedicated server only, see
 .Fl D ) .
-.It Fl g Op Ar savegame
+.It Fl g Op Ar file
 Load
-.Ar savegame
-at start or start a new game if omitted.
-.Ar savegame
+.Ar file
+(can be either a savegame, scenario, or heightmap) at start or start a new game if omitted.
+.Ar file
 must be either an absolute path or one relative to the current path or one of
 the search paths.
 .It Fl G Ar seed