Add Hostname

#### Default
[Fail2Ban] ssh: banned 1.2.3.4
[Fail2Ban] ssh: started
[Fail2Ban] ssh: stopped

When monitor multiple servers, Its a painful to know on which server brute-force attack is happening.

#### Updated:

[Fail2Ban - miteshshah.com] ssh: banned 1.2.3.4
[Fail2Ban - miteshshah.com] ssh: started
[Fail2Ban - miteshshah.com] ssh: stopped

Its clearly know the attack is happening on miteshshah.com