Support PETSCII terminals connected to non-PETSCII ports
The reported problem (by John "Jay" Crutti) was: If autodetection of the terminal is used from the defaults menu I get stuck on the prompt to hit my Delete key because on the BBS, it keeps showing me login statistics every time I hit my delete key. Add/use new K_CTRLKEYS mode to stop inkey() from handling/eating control-keys (e.g. Ctrl-T) when asking user to hit backspace during defaults->terminal settings. Allow PETSCII_DELETE (Ctrl-T) as a valid option when asking for the backspace/delete key and set the PETSCII flag in the autoterm variable if hit by the user.
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