Joseph Doherty
e57d864ab2
The dashboard auth cookie name was hardcoded to the constant DashboardAuthenticationDefaults.CookieName (MxGatewayDashboard). Browser cookies are scoped by host+path but NOT by port, so two gateway instances sharing a hostname would clobber each other's dashboard session under the shared name. Add DashboardOptions.CookieName (MxGateway:Dashboard:CookieName); null/blank keeps the canonical default. Applied in the existing dashboard cookie PostConfigure (runs after the inline AddCookie default, so it wins). Behaviour is unchanged when unset. Adds a Tests case for the override.