tree-wide: use _cleanup_(sd_bus_flush_close_unrefp) at various appropriate places

Let's shorten the code a bit.

src/busctl/busctl.c

@@ -2010,7 +2010,7 @@ static int busctl_main(sd_bus *bus, int argc, char *argv[]) {
 }
 
 int main(int argc, char *argv[]) {
-        sd_bus *bus = NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
         log_parse_environment();
@@ -2100,7 +2100,6 @@ int main(int argc, char *argv[]) {
         r = busctl_main(bus, argc, argv);
 
 finish:
-        sd_bus_flush_close_unref(bus);
         pager_close();
 
         strv_free(arg_matches);

src/locale/localectl.c

@@ -594,7 +594,7 @@ static int localectl_main(sd_bus *bus, int argc, char *argv[]) {
 }
 
 int main(int argc, char*argv[]) {
-        sd_bus *bus = NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
         setlocale(LC_ALL, "");
@@ -614,7 +614,6 @@ int main(int argc, char*argv[]) {
         r = localectl_main(bus, argc, argv);
 
 finish:
-        sd_bus_flush_close_unref(bus);
         pager_close();
 
         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;

src/login/loginctl.c

@@ -1584,7 +1584,7 @@ static int loginctl_main(int argc, char *argv[], sd_bus *bus) {
 }
 
 int main(int argc, char *argv[]) {
-        sd_bus *bus = NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
         setlocale(LC_ALL, "");
@@ -1607,8 +1607,6 @@ int main(int argc, char *argv[]) {
         r = loginctl_main(argc, argv, bus);
 
 finish:
-        sd_bus_flush_close_unref(bus);
-
         pager_close();
         polkit_agent_close();
 

src/machine/machinectl.c

@@ -3046,7 +3046,7 @@ static int machinectl_main(int argc, char *argv[], sd_bus *bus) {
 }
 
 int main(int argc, char*argv[]) {
-        sd_bus *bus = NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
         setlocale(LC_ALL, "");
@@ -3069,7 +3069,6 @@ int main(int argc, char*argv[]) {
         r = machinectl_main(argc, argv, bus);
 
 finish:
-        sd_bus_flush_close_unref(bus);
         pager_close();
         polkit_agent_close();
 

src/mount/mount-tool.c

@@ -1619,8 +1619,6 @@ int main(int argc, char* argv[]) {
         }
 
 finish:
-        bus = sd_bus_flush_close_unref(bus);
-
         pager_close();
 
         free(arg_mount_what);

src/timedate/timedatectl.c

@@ -472,7 +472,7 @@ static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) {
 }
 
 int main(int argc, char *argv[]) {
-        sd_bus *bus = NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
         setlocale(LC_ALL, "");
@@ -492,7 +492,6 @@ int main(int argc, char *argv[]) {
         r = timedatectl_main(bus, argc, argv);
 
 finish:
-        sd_bus_flush_close_unref(bus);
         pager_close();
 
         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;