fire

Results 2 issues of fire

This should fix the breaking change in 1.14.0 affecting fail2ban. [Blog entry 1.14.0](https://blog.gitea.io/2021/04/gitea-1.14.0-is-released/)

If you use the system sshd the /bin/false shell will result in mysterios erros when trying to clone a repository, because /bin/false can not provide a login shell to enable...