doc: add examples and notes to http server.close et al
Add examples to http server.close, server.closeAllConnections, server.closeIdleConnections. Also add notes about usage for both server.close*Connections libraries.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Add examples to http server.close, server.closeAllConnections, server.closeIdleConnections. Also add notes about usage for both server.close*Connections libraries.