* Allow overrides on all methods
* Add non-returning SendHttpRequest methods
* Use SendHttpRequest consistently
* Use file-scoped namespace
* Rates: Set default null value for currencyPair
* Ensure it works with instances which have BTCPAY_ROOTPATH set
* Greenfield: Admins can create/delete API keys of any user
* Greenfield: Improve doc for scoped apikey (Close#4673)
* Fix permissions hierarchy
* Update BTCPayServer.Client/Permissions.cs
* Fix tests
---------
Co-authored-by: Andrew Camilleri <evilkukka@gmail.com>
