This patch corrects the following:

- Users appear to be logged in when they are not because CDE dtterm sometimes
  doesn't reset the utmp entry on exit.

- Prevents the escape sequence that sets DECterm window titles from hanging
  dtterm windows.

- When running the Common Desktop Environment (CDE), a dtterm window in which
  vi is being used can hang when doing a cut and paste operation from a 
  second window.

- Provides the ability to let dtterm display all the characters in the PC
  codeset IBM-850.

- Fixes a problem in which the dtterm Terminal Emulator fails to send the "DO" 
  and "HELP" User Defined Keys when depressed.  It also fixes a problem in 
  which proper escape sequences for "F10", "DO", and "HELP" were not being 
  reported when the keys were depressed.