Add headers for Microsoft Exchange.

[righettod]

Hi,

This PR add headers disclosing information about the Microsoft Exchange software in use.

🌎 Sources:

• https://learn.microsoft.com/en-us/openspecs/exchange_server_protocols/ms-ashttp/08ad30b6-5b73-41bc-890b-1cab2cf49827
• A assessment I performed recently against a Exchange on premise instance.

Thanks in advance 😃

[righettod]

Thank you @riramar 👍

[riramar]

YW 👍🏻