tree-wide: Make sure all headers are standalone

Let's make sure all of our headers include everything they require.

src/network/networkd-bridge-mdb.h

@@ -2,6 +2,7 @@
 #pragma once
 
 #include <inttypes.h>
+#include <net/ethernet.h>
 
 #include "conf-parser.h"
 #include "in-addr-util.h"

src/network/networkd-ipv4acd.h

@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
+#include <stdbool.h>
+
 typedef struct Address Address;
 typedef struct Link Link;
 

src/network/networkd-netlabel.h

@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
+typedef struct Address Address;
+
 void address_add_netlabel(const Address *address);
 void address_del_netlabel(const Address *address);

src/network/networkd-nexthop.h

@@ -17,6 +17,7 @@ typedef struct Link Link;
 typedef struct Manager Manager;
 typedef struct Network Network;
 typedef struct NextHop NextHop;
+typedef struct Request Request;
 typedef int (*nexthop_netlink_handler_t)(
                 sd_netlink *rtnl,
                 sd_netlink_message *m,

src/network/networkd-radv.h

@@ -15,6 +15,7 @@
 #include "ndisc-option.h"
 #include "networkd-util.h"
 
+typedef struct Address Address;
 typedef struct Link Link;
 typedef struct Network Network;
 

src/network/networkd-route-util.h

@@ -5,6 +5,7 @@
 #include <stdbool.h>
 
 #include "conf-parser.h"
+#include "in-addr-util.h"
 
 typedef struct Link Link;
 typedef struct Manager Manager;

src/network/networkd-state-file.h

@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
+#include <stdbool.h>
+
 typedef struct Link Link;
 typedef struct Manager Manager;
 

src/network/networkd-wiphy.h

@@ -4,6 +4,7 @@
 #include <inttypes.h>
 
 #include "sd-device.h"
+#include "sd-netlink.h"
 
 #include "macro.h"