Add autosave_on_network_disconnect setting to GUI

src/lang/english.txt

@@ -1450,6 +1450,9 @@ STR_CONFIG_SETTING_RIGHT_MOUSE_WND_CLOSE_HELPTEXT               :Closes a window
 STR_CONFIG_SETTING_AUTOSAVE                                     :Autosave: {STRING2}
 STR_CONFIG_SETTING_AUTOSAVE_HELPTEXT                            :Select interval between automatic game saves
 
+STR_CONFIG_SETTING_AUTOSAVE_ON_NETWORK_DISCONNECT               :Autosave on network disconnection: {STRING2}
+STR_CONFIG_SETTING_AUTOSAVE_ON_NETWORK_DISCONNECT_HELPTEXT      :When enabled, multiplayer clients automatically save the game when disconnected from the server
+
 STR_CONFIG_SETTING_DATE_FORMAT_IN_SAVE_NAMES                    :Use the {STRING2} date format for savegame names
 STR_CONFIG_SETTING_DATE_FORMAT_IN_SAVE_NAMES_HELPTEXT           :Format of the date in save game filenames
 STR_CONFIG_SETTING_DATE_FORMAT_IN_SAVE_NAMES_LONG               :long (31st Dec 2008)

src/settings_gui.cpp

@@ -1603,6 +1603,7 @@ static SettingsContainer &GetSettingsTree()
 			}
 
 			interface->Add(new SettingEntry("gui.autosave"));
+			interface->Add(new SettingEntry("gui.autosave_on_network_disconnect"));
 			interface->Add(new SettingEntry("gui.toolbar_pos"));
 			interface->Add(new SettingEntry("gui.statusbar_pos"));
 			interface->Add(new SettingEntry("gui.prefer_teamchat"));

src/table/settings.ini

@@ -3904,6 +3904,8 @@ cat      = SC_BASIC
 var      = gui.autosave_on_network_disconnect
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
 def      = true
+str      = STR_CONFIG_SETTING_AUTOSAVE_ON_NETWORK_DISCONNECT
+strhelp  = STR_CONFIG_SETTING_AUTOSAVE_ON_NETWORK_DISCONNECT_HELPTEXT
 cat      = SC_EXPERT
 
 [SDTC_VAR]