ProxyAuthMaxRetries is an Integer property that represents the maximum number of attempts allowed for authentication of a proxied connection. ProxyAuthMaxRetries is used with Proxy parameters for the Request when
Connect is called for the client session. ProxyAuthMaxRetries is also examined when the OnProxyAuthorization event handler is triggered from DoRequest.
The default value for ProxyAuthMaxRetries is Id_TIdHTTP_MaxAuthRetries, as assigned in the Create constructor.