允许注册中文名

sed -i "s#a-z0-9_-#-_a-z0-9\\\x7f-\\\xff#" \
vendor/flarum/core/src/User/UserValidator.php

允许 @ 中文名

sed -i "s#a-z0-9_-#-_a-zA-Z0-9\\\x7f-\\\xff#" \
vendor/flarum/mentions/src/ConfigureMentions.php

转载：https://www.jianshu.com/p/bb7fcde11b7e