Update documentation.

- Convert http to https, provide archive link when possible.
- Made CPU-JIT.png more readable on dark themes;
Added a white background so there isn't black text on a black
background.

src/xenia/vfs/devices/stfs_container_device.h

@@ -19,7 +19,7 @@
 namespace xe {
 namespace vfs {
 
-// http://www.free60.org/wiki/STFS
+// https://free60project.github.io/wiki/STFS.html
 
 class StfsContainerEntry;
 

src/xenia/vfs/entry.h

@@ -34,7 +34,7 @@ namespace vfs {
 class Device;
 class File;
 
-// Matches http://source.winehq.org/source/include/winternl.h#1591.
+// Matches https://source.winehq.org/source/include/winternl.h#1591.
 enum class FileAction {
   kSuperseded = 0,
   kOpened = 1,