On 2.8.8, ALLSERV DISCONNECT can be used to disconnect from all servers. However, neither ALLSERV RECONNECT nor RECONNECT ALL can be used to reconnect, even though RECONNECT works as expected when used on the individual servers. I assume both options only consider servers that are already connected.
The option to reconnect to all servers, including (or only) those that are disconnected is desireable for scripting. Specifically, I'd like to disconnect when my Laptop enters sleep mode and reconnect when it wakes up, so that I don't timeout on the remote end.