+ The termlib.buildlink3.mk file is meant to be included by packages
  that need basic termlib functionality, i.e. tgetent(), tgoto(),
  tputs(), etc.  Together with the termlib.builtin.mk file, they will
  use either a built-in termcap library, a built-in X/Open "enhanced"
  curses library, or ncurses to provide these functions.

+ Add BUILDLINK_LIBNAME.* definitions to the various curses buildlink3.mk
  and builtin.mk files that give the "base" library name of the curses
  library, e.g. curses, ncurses, etc.  These are used by the termlib
  files to set BUILDLINK_LIBNAME.termlib.

(jlam)