* Update release number to 118.
Github Issues:
* Update `BUILD.adoc` to specifically require asciidoctor 1.5.8, and make
that change to the gitlab CI script (public issue 968).
* Remove redundant slink:VkSubpassDependency and
slink:VkSubpassDependency2KHR valid usage statements
(public pull request 995).
* Clarify the <<vkGetInstanceProcAddr behavior>> and <<vkGetDeviceProcAddr
behavior>> tables (public pull request 1004).
* Fix use of nonexistent
slink:VkSamplerYcbcrConversionImageFormatProperties::pname:maxCombinedImageSamplerDescriptorCount
(public pull request 1010).
* Use compatible pathlib for python2 (public pull request 1012).
Internal Issues:
* Mark the <<VK_KHR_vulkan_memory_model>> extension as no longer
provisional in `vk.xml` (internal issue 1369).
* Clarify that use-defined code:Input and code:Output variables cannot be
code:Boolean in the <<interfaces-iointerfaces-user, User-defined
Variable Interface>> section (internal issue 1663).
* Fix naming inconsistencies in
slink:VkPhysicalDevicePerformanceQueryFeaturesKHR,
slink:VkPhysicalDevicePerformanceQueryPropertiesKHR,
slink:VkQueryPoolPerformanceCreateInfoKHR, and associated enumerants
(internal issue 1746).
* Use ACM reference style for normative references (internal merge request
3256).
* Explicitly list the features changed in Vulkan 1.1 in the
<<features-requirements, Feature Requirements>> section and the
<<versions, Core Revisions (Informative)>> appendix (internal merge
request 3274).
* Add the slink:VkPhysicalDeviceSubgroupSizeControlFeaturesEXT structure
to the <<VK_EXT_subgroup_size_control>> extension, which was
accidentally omitted in the initial release of the extension (internal
merge request 3287).
* Add missing slink:VkImageUsageFlag description for
ename:VK_IMAGE_USAGE_FRAGMENT_DENSITY_MAP_BIT_EXT (internal merge
request 3292).
* Add valid usage statements to slink:VkAccelerationStructureInfoNV and
flink:vkGetAccelerationStructureHandleNV to clarify usage of
acceleration structure handle and geometries (internal merge request
3292).
New Extensions:
* `<<VK_AMD_shader_core_properties2>>`
* `<<VK_AMD_pipeline_compiler_control>>`
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