use keepalive on CLI (#629)

Instead of the more aggressive closing of all sockets when a peer disconnects, use TCP keepalive on cli sockets. The reason is that multiple instances of an application can share the same target IP address and we don't want to aggressively force close all CLI active socket just because a single instance failed
LMS-Community · Jun 30, 2021 · 715f435 · 715f435
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diff --git a/Slim/Networking/Slimproto.pm b/Slim/Networking/Slimproto.pm
@@ -251,9 +251,6 @@ sub slimproto_close {
 	Slim::Networking::Select::removeWrite($clientsock);
 	Slim::Networking::Select::removeWriteNoBlockQ($clientsock);
 
-	# close any associated cli_socket
-	Slim::Plugin::CLI::Plugin::client_socket_cleanup($clientsock->peerhost);
-
 	# close socket
 	$clientsock->close();