* Bump API patch number and header version number to 41 for this update.
Github Issues:
* Made all uses of `NULL` vs. code:VK_NULL_HANDLE consistent (public issue
276).
* Clarify render pass compatibility in different usage scenarios (public
issues 303 and 304).
* Add valid usage statements to slink:VkFramebufferCreateInfo requiring
that the width, height, and number of layers of the framebuffer all be
nonzero (public issue 432).
* Allow `offset` and `align` in any GLSL version for the
`GL_KHR_vulkan_glsl` extension (public issue 435).
* Specify lifetime of string objects passed to the
tlink:PFN_vkDebugReportCallbackEXT user callback in the
+VK_EXT_debug_report+ extension (public issue 446).
* Fix inter-page links in multi-file reference pages (public issue 454).
Internal Issues:
* Update valid usage language for slink:VkImageCreateInfo to disallow
creating images that have ename:VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT
set without other attachment usage bits
(ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT,
ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, or
ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT) (internal issue 540).
* Disable `VK_EXT_swapchain_colorspace` extension until internal issues
640 and 661 are mutually resolved.
* Allow alternative mipmap level selection when [eq]#lambda == 0.5# during
texture <<textures-image-level-selection,Image Level(s) Selection>>
(internal issue 680).
Other Issues:
* Add a clarification to the style guide that the extension revision
number is treated as a patch number, so that changes to published
extensions should only include bug fixes and spec clarifications.
Jon Leech