Adds killclient_byappid to internal commands

src/config/parse_config.h

@@ -989,7 +989,10 @@ FuncType parse_func_name(char *func_name, Arg *arg, char *arg_value,
 		(*arg).i = atoi(arg_value);
 	} else if (strcmp(func_name, "killclient") == 0) {
 		func = killclient;
-	} else if (strcmp(func_name, "centerwin") == 0) {
+	} else if (strcmp(func_name, "killclient_byappid") == 0) {
+        func = killclient_byappid;
+        (*arg).v = strdup(arg_value);
+    } else if (strcmp(func_name, "centerwin") == 0) {
 		func = centerwin;
 	} else if (strcmp(func_name, "focuslast") == 0) {
 		func = focuslast;

src/dispatch/bind_declare.h

@@ -34,6 +34,7 @@ int32_t exchange_client(const Arg *arg);
 int32_t exchange_stack_client(const Arg *arg);
 int32_t exchange_stack_client_bounded(const Arg *arg);
 int32_t killclient(const Arg *arg);
+int32_t killclient_byappid(const Arg *arg);
 int32_t toggleglobal(const Arg *arg);
 int32_t incnmaster(const Arg *arg);
 int32_t focusmon(const Arg *arg);

src/dispatch/bind_define.h

@@ -409,6 +409,21 @@ int32_t killclient(const Arg *arg) {
 	return 0;
 }
 
+int32_t killclient_byappid(const Arg *arg) {
+    Client *c = NULL;
+    /* No Arg? No Kill. */
+    if (!arg || !arg->v) 
+        return 0;
+    /* for some reason its warning me about this indent? */
+
+    wl_list_for_each(c, &clients, link) {
+        if (strcmp((*arg).v, client_get_appid(c)) == 0) {
+            pending_kill_client(c);
+        }
+    }
+    return 0;
+}
+
 int32_t moveresize(const Arg *arg) {
 	const char *cursors[] = {"nw-resize", "ne-resize", "sw-resize",
 							 "se-resize"};