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/gpu/vulkan/vulkan_command_processor.cc

@@ -916,7 +916,7 @@ bool VulkanCommandProcessor::IssueCopy() {
   assert_true(copy_regs->copy_mask == 0);
 
   // RB_SURFACE_INFO
-  // http://fossies.org/dox/MesaLib-10.3.5/fd2__gmem_8c_source.html
+  // https://fossies.org/dox/MesaLib-10.3.5/fd2__gmem_8c_source.html
   uint32_t surface_info = regs[XE_GPU_REG_RB_SURFACE_INFO].u32;
   uint32_t surface_pitch = surface_info & 0x3FFF;
   auto surface_msaa = static_cast<MsaaSamples>((surface_info >> 16) & 0x3);