Flush any messages waiting on the Nagle timer and send them
at the next transmission opportunity (often that means right now).
If Nagle is enabled (it's on by default) then when calling
SendMessageToConnection the message will be buffered, up to the Nagle time
before being sent, to merge small messages into the same packet.
(See k_ESteamNetworkingConfig_NagleTime)
Flush any messages waiting on the Nagle timer and send them at the next transmission opportunity (often that means right now).
If Nagle is enabled (it's on by default) then when calling SendMessageToConnection the message will be buffered, up to the Nagle time before being sent, to merge small messages into the same packet. (See k_ESteamNetworkingConfig_NagleTime)