Change the default IP and subnet for telnetd

Created by: ollieparanoid

@MartijnBraam on IRC:

192.168.2.0/24 is the same as my home network so I have to disconnect wifi to connect it [...] maybe better to use something more exotic like 172.16.42.0/24 10.0.0.0/8 and 192.168.0.0/16 are the most used on home and company networks so a 172.16 subnet should be fine

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