ncurses 5.9 - patch 20150110

ncurses 5.9 - patch 20150110

+ add a step to generating ".map" files, to declare any remaining
  symbols beginning with "_" as local, at the last version node.
+ improve configure checks for pkg-config, addressing a variant found
  with FreeBSD ports.
+ modify win_driver.c to provide characters for special keys, like
  ansi.sys, when keypad mode is off, rather than returning nothing at
  all (discussion with Eli Zaretskii).
+ add "broken_linker" and "hashed-db" configure options to combinations
  use for generating the ".map" and ".sym" files.
+ avoid using "ld" directly when creating shared library, to simplify
  cross-compiles.  Also drop "-Bsharable" option from shared-library
  rules for FreeBSD and DragonFly (FreeBSD #196592).
+ fix a memory leak in form library Free_RegularExpression_Type()
  (report by Pavel Balaev).