Updater: Add code documentation Markdown file

Add docs/autoupdate_overview.md which gives an overview of the update
process, and comments pointing to it in autoupdate related files.

Source/Core/DolphinQt/Updater.cpp

@@ -17,6 +17,8 @@
 #include "DolphinQt/QtUtils/RunOnObject.h"
 #include "DolphinQt/Settings.h"
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 Updater::Updater(QWidget* parent) : m_parent(parent)
 {
   connect(this, &QThread::finished, this, &QObject::deleteLater);

Source/Core/DolphinQt/Updater.h

@@ -8,6 +8,8 @@
 
 #include "UICommon/AutoUpdate.h"
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 class QWidget;
 
 class Updater : public QThread, public AutoUpdateChecker

Source/Core/MacUpdater/AppDelegate.mm

@@ -10,13 +10,16 @@
 #include <string>
 #include <vector>
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 @interface AppDelegate ()
 
 @end
 
 @implementation AppDelegate
 
-- (void)applicationDidFinishLaunching:(NSNotification*)aNotification {
+- (void)applicationDidFinishLaunching:(NSNotification*)aNotification
+{
   NSArray* arguments = [[NSProcessInfo processInfo] arguments];
 
   __block std::vector<std::string> args;
@@ -32,7 +35,8 @@
   });
 }
 
-- (void)applicationWillTerminate:(NSNotification*)aNotification {
+- (void)applicationWillTerminate:(NSNotification*)aNotification
+{
 }
 
 @end

Source/Core/MacUpdater/main.m

@@ -4,6 +4,8 @@
 
 #include <Cocoa/Cocoa.h>
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 int main(int argc, const char** argv)
 {
   if (argc == 1)

Source/Core/UICommon/AutoUpdate.cpp

@@ -29,6 +29,8 @@
 #define OS_SUPPORTS_UPDATER
 #endif
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 namespace
 {
 bool s_update_triggered = false;

Source/Core/UICommon/AutoUpdate.h

@@ -6,6 +6,8 @@
 
 #include <string>
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 // This class defines all the logic for Dolphin auto-update checking. UI-specific elements have to
 // be defined in a backend specific subclass.
 class AutoUpdateChecker

Source/Core/UpdaterCommon/UpdaterCommon.cpp

@@ -25,6 +25,8 @@
 #include <sys/types.h>
 #endif
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 namespace
 {
 // Where to log updater output.

Source/Core/UpdaterCommon/UpdaterCommon.h

@@ -13,4 +13,6 @@
 
 #include "Common/CommonTypes.h"
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 bool RunUpdater(std::vector<std::string> args);

Source/Core/WinUpdater/Main.cpp

@@ -16,6 +16,8 @@
 #include "UpdaterCommon/UI.h"
 #include "UpdaterCommon/UpdaterCommon.h"
 
+// Refer to docs/autoupdate_overview.md for a detailed overview of the autoupdate process
+
 int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow)
 {
   if (lstrlenW(pCmdLine) == 0)