various: set info on varlink server object

The values that were previously hardcoded in sd-varlink.c are now defined
in new varlink_set_info_systemd() and that function is called everywhere
where we create a server.

src/network/networkd-manager-varlink.c

@@ -12,6 +12,7 @@
 #include "networkd-manager-varlink.h"
 #include "stat-util.h"
 #include "varlink-io.systemd.Network.h"
+#include "varlink-util.h"
 
 static int vl_method_get_states(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata) {
         Manager *m = ASSERT_PTR(userdata);
@@ -270,12 +271,10 @@ int manager_connect_varlink(Manager *m) {
         if (m->varlink_server)
                 return 0;
 
-        r = sd_varlink_server_new(&s, SD_VARLINK_SERVER_ACCOUNT_UID|SD_VARLINK_SERVER_INHERIT_USERDATA);
+        r = varlink_server_new(&s, SD_VARLINK_SERVER_ACCOUNT_UID|SD_VARLINK_SERVER_INHERIT_USERDATA, m);
         if (r < 0)
                 return log_error_errno(r, "Failed to allocate varlink server object: %m");
 
-        sd_varlink_server_set_userdata(s, m);
-
         (void) sd_varlink_server_set_description(s, "varlink-api-network");
 
         r = sd_varlink_server_add_interface(s, &vl_interface_io_systemd_Network);