networkd-wait-online: move to separate subdirectory

Also clean up the header files a bit.

Makefile.am

@@ -5684,11 +5684,11 @@ systemd_networkd_wait_online_CFLAGS = \
 
 systemd_networkd_wait_online_SOURCES = \
 	src/libsystemd-network/network-internal.h \
-	src/network/networkd-wait-online.h \
-	src/network/networkd-wait-online-link.h \
-	src/network/networkd-wait-online.c \
-	src/network/networkd-wait-online-manager.c \
-	src/network/networkd-wait-online-link.c
+	src/network/wait-online/link.h \
+	src/network/wait-online/link.c \
+	src/network/wait-online/manager.h \
+	src/network/wait-online/manager.c \
+	src/network/wait-online/wait-online.c
 
 systemd_networkd_wait_online_LDADD = \
 	libsystemd-network.la \

src/network/wait-online/link.c

@@ -21,7 +21,9 @@
 #include "sd-network.h"
 
 #include "alloc-util.h"
-#include "networkd-wait-online-link.h"
+#include "hashmap.h"
+#include "link.h"
+#include "manager.h"
 #include "string-util.h"
 
 int link_new(Manager *m, Link **ret, int ifindex, const char *ifname) {

src/network/wait-online/link.h

@@ -20,9 +20,10 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-typedef struct Link Link;
+#include "sd-netlink.h"
 
-#include "networkd-wait-online.h"
+typedef struct Link Link;
+typedef struct Manager Manager;
 
 struct Link {
         Manager *manager;

src/network/wait-online/manager.c

@@ -22,10 +22,10 @@
 #include <fnmatch.h>
 
 #include "alloc-util.h"
+#include "link.h"
+#include "manager.h"
 #include "netlink-util.h"
 #include "network-internal.h"
-#include "networkd-wait-online-link.h"
-#include "networkd-wait-online.h"
 #include "time-util.h"
 #include "util.h"
 

src/network/wait-online/manager.h

@@ -26,8 +26,7 @@
 #include "hashmap.h"
 
 typedef struct Manager Manager;
-
-#include "networkd-wait-online-link.h"
+typedef struct Link Link;
 
 struct Manager {
         Hashmap *links;

src/network/wait-online/wait-online.c

@@ -22,7 +22,7 @@
 
 #include "sd-daemon.h"
 
-#include "networkd-wait-online.h"
+#include "manager.h"
 #include "signal-util.h"
 #include "strv.h"