Replaced the hard-coded "clear-screen" sequence during logon with new text.dat

string: LoggingOn
This was the *first* possible cause of an auto-pause ([Hit a key] prompt)
during successful SSH logins.
The new text string is just "Logging on to @bbs@ as @alias@ @ellipsis@"
- if you want a screen clear here or to display a text file, you can do so by
  modifying this line.