Add support for tag HIL_TAG_WEBSERVER_ENABLE (0x10920002)

The taglist editor shall support the following new taglist entry that enables a firmware integrator to globally enable or disable the integrated web server:

#define HIL_TAG_WEBSERVER_ENABLE        0x10920002

The following options are available:

• Disabled
  The web server is completely turned off (is not initialized/started by the firmware) and therefore cannot be dynamically started (e.g. by the host application).
  Use case: the web server is not needed by the product the firmware is integrated in. Disabling the web server saves memory that can be used for other purposes.
• Enabled 
  The firmware will start/initialize the web server with the configuration provided by the following taglist entries:
  • Webserver (HTTP) Configuration 
    (HIL_TAG_HTTP_PORT_CONFIG      0x10920000)
  • Webserver (HTTPS) Configuration
    (HIL_TAG_HTTPS_PORT_CONFIG    0x10920001)

The definition of the new taglist entry is documented in HILDEF-237.

Name of the taglist entry: "Web Server Support"
Name of the taglist parameter (checkbox): "Enable web server"