REORG: listener: move xfer_sock_list to sock.{c,h}.
This will be used for receivers as well thus it is not specific to
listeners but to sockets.
diff --git a/src/sock.c b/src/sock.c
index 2eb4b6f..56a4a5c 100644
--- a/src/sock.c
+++ b/src/sock.c
@@ -24,10 +24,13 @@
#include <haproxy/api.h>
#include <haproxy/connection.h>
+#include <haproxy/listener-t.h>
#include <haproxy/namespace.h>
#include <haproxy/sock.h>
#include <haproxy/tools.h>
+/* the list of remaining sockets transferred from an older process */
+struct xfer_sock_list *xfer_sock_list = NULL;
/* Create a socket to connect to the server in conn->dst (which MUST be valid),
* using the configured namespace if needed, or the one passed by the proxy