ncurses 6.0 - patch 20171209

+ modify misc/ncurses-config.in to make output with --includedir
  consistent with --cflags, i.e., when --disable-overwrite option was
  configured the output should show the subdirectory where headers
  are.
+ modify MKlib_gen.sh to suppress macros when calling an "implemented"
  function in link_test.c
+ updated ftp-url used in test-packages, etc.
+ modify order of -pie/-shared options in configure script in case
  LDFLAGS uses "-pie", working around a defect or limitation in the GNU
  linker (prompted by patch by Yogesh Prasad, forwarded by Jay Shah).
+ add entry in man_db.renames for user_caps.5