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).