ncurses 5.6 - patch 20070331

ncurses 5.6 - patch 20070331

+ modify Ada95 binding to build with --enable-reentrant by wrapping
  global variables (bug: acs_map does not yet work).
+ modify Ada95 binding to use the new access-functions, allowing it
  to build/run when NCURSES_OPAQUE is set.
+ add access-functions and macros to return properties of the WINDOW
  structure, e.g., when NCURSES_OPAQUE is set.
+ improved install-sh's quoting.
+ use mkdirs.sh rather than mkinstalldirs, e.g., to use fixes from
  other programs.
  NCURSES_OPAQUE set, since we cannot pass a reference to