Merge in 'release/6.0' changes

src/Components/Web.JS/src/Platform/BootConfig.ts

src/Middleware/HttpLogging/src/FileLoggerProcessor.cs

src/Middleware/HttpLogging/src/ISystemDateTime.cs

src/Middleware/HttpLogging/src/SystemDateTime.cs

src/Middleware/HttpLogging/test/FileLoggerProcessorTests.cs

src/Middleware/HttpLogging/test/MockSystemDateTime.cs

src/Middleware/Spa/SpaProxy/src/SpaProxyLaunchManager.cs