Header Host is now collected by Webserver

[s-hadinger]

Description:

Add Host header to headers collect by requests to Webserver. This will allow to know the domain name or ip address used by the browser to reach the page, and improve the opening of other port (ex: GPIO Viewer)

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.4.9
• The code change is tested and works with Tasmota core ESP32 V.2.0.14
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass