CLEANUP: server: Rename state_line node to node instead of name_name

<state_line.name_name> field is a node in an eb-tree. Thus, instead of
"name_name", we now use "node" to name this field. If is a more explicit
name and not too strange.
diff --git a/include/haproxy/server-t.h b/include/haproxy/server-t.h
index d752ac3..c3d5b12 100644
--- a/include/haproxy/server-t.h
+++ b/include/haproxy/server-t.h
@@ -377,8 +377,8 @@
  */
 struct state_line {
 	char *line;
-	struct ebmb_node name_name;
-	/* WARNING don't put anything after name_name, it's used by the key */
+	struct ebmb_node node;
+	/* WARNING don't put anything after node, it's used by the key */
 };
 
 
diff --git a/src/server.c b/src/server.c
index 6b2af88..5e23580 100644
--- a/src/server.c
+++ b/src/server.c
@@ -3273,8 +3273,8 @@
 		if (st == NULL) {
 			goto nextline;
 		}
-		memcpy(st->name_name.key, trash.area, trash.data + 1);
-		if (ebst_insert(&state_file, &st->name_name) != &st->name_name) {
+		memcpy(st->node.key, trash.area, trash.data + 1);
+		if (ebst_insert(&state_file, &st->node) != &st->node) {
 			/* this is a duplicate key, probably a hand-crafted file,
 			 * drop it!
 			 */
@@ -3321,7 +3321,7 @@
 				node = ebst_lookup(&state_file, trash.area);
 				if (!node)
 					continue; /* next server */
-				st = ebmb_entry(node, struct state_line, name_name);
+				st = ebmb_entry(node, struct state_line, node);
 				strcpy(mybuf, st->line); /* st->line is always small enough */
 
 				ret = srv_state_parse_line(mybuf, global_vsn, params);
@@ -3415,7 +3415,7 @@
 
 	node = ebmb_first(&state_file);
         while (node) {
-                st = ebmb_entry(node, struct state_line, name_name);
+                st = ebmb_entry(node, struct state_line, node);
                 next_node = ebmb_next(node);
                 ebmb_delete(node);
 		free(st->line);