Allow output config for output named *

Which will match any output.

sway.5.txt

@@ -140,6 +140,10 @@ Commands
 	You can get a list of output names like so:
 	+
 	swaymsg -t get_outputs
+	+
+	You may also match any output by using the output name "*". Be sure to add
+	this output config after the others, or it will be matched instead of the
+	others.
 
 **reload**::
 	Reloads the sway config file without restarting sway.

sway/config.c

@@ -289,6 +289,18 @@ void apply_output_config(struct output_config *oc, swayc_t *output) {
 		output->x = x;
 	}
 
+	if (!oc || !oc->background) {
+		// Look for a * config for background
+		int i;
+		for (i = 0; i < config->output_configs->length; ++i) {
+			oc = config->output_configs->items[i];
+			if (strcasecmp("*", oc->name) == 0) {
+				break;
+			}
+			oc = NULL;
+		}
+	}
+
 	if (oc && oc->background) {
 		int i;
 		for (i = 0; i < root_container.children->length; ++i) {

sway/container.c

@@ -87,7 +87,10 @@ swayc_t *new_output(wlc_handle handle) {
 			sway_log(L_DEBUG, "Matched output config for %s", name);
 			break;
 		}
-		oc = NULL;
+		if (strcasecmp("*", oc->name) == 0) {
+			sway_log(L_DEBUG, "Matched wildcard output config for %s", name);
+			break;
+		}
 	}
 
 	if (oc && !oc->enabled) {