AspNetCore 3.0 Preview 6.0 Introduces HeaderPropagation middleware

[kdcllc]

• Simply Implementation of HeaderProgagation by @davidfowl
• Add a header propagation middleware and message handler #526
• Port of HeaderPropagation for AspNetCore 2.x

References

• Adding a HttpMessageHandlerType that is registered as Transient in IServiceCollection creates strange results

• Creating a scoped service with an HttpClientFactory

• Add HttpMessageHandler factory

[ts46235]

Please let us know when/if header propagation will be added to console apps

[kdcllc]

@ts46235 this is a nice to have feature, if you would like to contribute let me know.