ncurses 5.9 - patch 20110625

ncurses 5.9 - patch 20110625

+ improve cleanup() function in lib_tstp.c, using _exit() rather than
  exit() and checking for SIGTERM rather than SIGQUIT (prompted by
  comments forwarded by Nicholas Marriott).
+ reduce name pollution from term.h, moving fallback #define's for
  tcgetattr(), etc., to new private header nc_termios.h (report by
  Sergio NNX).
+ two minor fixes for tracing (patch by Vassili Courzakis).
+ improve trace initialization by starting it in use_env() and
  ripoffline().
+ review old email, add details for some changelog entries.