ncurses 5.9 - patch 20150103

ncurses 5.9 - patch 20150103

+ modify_nc_flush() to retry if interrupted (patch by Stian Skjelstad).
+ change map files to make _nc_freeall a global, since it may be used
  via the Ada95 binding when checking for memory leaks.
+ improve sed script used in 20141220 to account for wide-, threaded-
  variations in ABI 6.