mgt: Avoid needless cache_acceptor.h includes

We don't need a complete struct acceptor definition to satisfy
mgt_acceptor.h declarations.

Author: dridi

bin/varnishd/acceptor/mgt_acceptor.h

@@ -43,6 +43,8 @@ struct listen_arg {
 	const struct uds_perms		*perms;
 };
 
+struct acceptor;
+
 void VCA_Add(struct acceptor *);
 void VCA_Config(void);
 

bin/varnishd/mgt/mgt_child.c

@@ -47,7 +47,6 @@
 #include <sys/resource.h>
 
 #include "mgt.h"
-#include "acceptor/cache_acceptor.h"
 #include "acceptor/mgt_acceptor.h"
 
 #include "vapi/vsig.h"

bin/varnishd/mgt/mgt_main.c

@@ -47,7 +47,6 @@
 #include <sys/socket.h>
 
 #include "mgt/mgt.h"
-#include "acceptor/cache_acceptor.h"
 #include "acceptor/mgt_acceptor.h"
 #include "common/heritage.h"