Changes to Get site and API information

api operation id get_index_ removed and replaced with getIndex

the endpoint scheme security XF-Api-Key was added to the API

the endpoint scheme security XF-OAuth2 was added to the API

added the new optional header request parameter XF-Api-User to all path's operations

added the new optional query request parameter api_bypass_permissions to all path's operations

the optional response header XF-Latest-Api-Version removed for the status 200

the optional response header XF-Request-User removed for the status 200

the optional response header XF-Request-User-Extras removed for the status 200

the optional response header XF-Used-Api-Version removed for the status 200

api operation id getIndex removed and replaced with get_index_

the endpoint scheme security XF-Api-Key was removed from the API

the endpoint scheme security XF-OAuth2 was removed from the API