Remove DotNet and Kylix support

[rlebeau]

Remove DotNet and Kylix support

[darianmiller]

One artifact of this is that IdNTLM.pas contains invalid source

type_3_message_header is defined within {$IFDEF DOTNET}

function type_3_message_header.GetBytesLen: UInt32;
begin
  Result := inherited GetByteLen() + ? ;
end;

[rlebeau]

Indy hasn't been recompiled for DotNet in a very very long time. The code you mention would be eliminated as part of this cleanup.

[darianmiller]

Correct, I just wanted to document another reason for doing the ticket.