.. so that calling scripts also realize that didn't work

HI,

I realize that there's a line with the word "ERROR" before but to make better clear that there was a scanning problem I suggest to emphasize that in caps:

```
+ ERROR: Error limit (20) reached for host, giving up. Last error: opening stream: can't connect (timeout): Interrupted system call
+ SCAN TERMINATED:  20 error(s) and 4 item(s) reported on remote host
+ End Time:           2020-09-14 14:45:35 (GMT2) (406 seconds)
---------------------------------------------------------------------------
```

This was from a scan where I mimicked a server-side blocking I encountered in real life, like with fail2ban which occurred in the middle of a scan.

Cheers, Dirk

Make clear that scan was terminated

Setting proper exit code when scan was terminated