ncurses 6.0 - patch 20151205

ncurses 6.0 - patch 20151205

+ update form_cursor.3x, form_post.3x, menu_attributes.3x to list
  function names in NAME section (patch by Jason McIntyre).
+ minor fixes to manpage NAME/SYNOPSIS sections to consistently use
  rule that either all functions which are prototyped in SYNOPSIS are
  listed in the NAME section, or the manual-page name is the sole item
  listed in the NAME section.  The latter is used to reduce clutter,
  e.g., for the top-level library manual pages as well as for certain
  feature-pages such as SP-funcs and threading (prompted by patches by
  Jason McIntyre).
+ add option to preserve leading whitespace in form fields (patch by
  Leon Winter).