web config with OPTIONSVerbHandler removed for CORS with Thinktecture.IdentityModel and ASP.NET Web API to work properly

gistfile1.xml

<system.webServer>
	<modules runAllManagedModulesForAllRequests="false">
		<remove name="WebDAVModule" />
	</modules>
	<handlers>
		<remove name="WebDAV"/>
		<remove name="OPTIONSVerbHandler"/>
		<remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" />
		<remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" />
		<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
		<add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
		<add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
		<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
	</handlers>
</system.webServer>