Update external getty TTY documentation, remove limitations
Also, provide an agetty example.
@@ -147,12 +147,12 @@ Syntax:
```
The second variant is for using an external getty, like agetty or the
- BusyBox getty. There are no default settings for this variant, but a
- word of caution: *you have give the absolute path to the TTY*.
+ BusyBox getty. There are no default settings for this variant.
**Example:**
```conf
tty [12345] /sbin/getty -L 115200 /dev/ttyAMA0 vt100
+ tty [12345] /sbin/agetty -L ttyAMA0 115200 vt100
```
On really bare bones systems Finit offers a fallback shell, but one
