ncurses 6.0 - patch 20170729

ncurses 6.0 - patch 20170729

+ update interix entry using tack and SFU on Windows 7 Ultimate -TD
+ use ^? for kdch1 in interix (reported by Jonathan de Boyne Pollard)
+ add "rep" to xterm-new, available since 1997/01/26 -TD
+ move SGR 24 and 27 from vte-2014 to vte-2012 (request by Alain
  Williams) -TD
+ add a check in newline_forces_scroll() in case a program moves the
  cursor outside scrolling margins (report by Robert King).
+ improve _nc_tparm_analyze, using that to extend the checks made by
  tic for reporting inconsistencies between the expected number of
  parameters for a capability and the actual.
+ amend handling of repeat_char capability in EmitRange (adapted from
  report/patch by Dick Wesseling):
  + translate the character to the alternate character set when the
    alternate character set is enabled.
  + do not use repeat_char for characters past 255.
+ document "_nc_free_tinfo" in manual page, because it could be used in
  tack for memory-leak checking.
+ add "--without-tack" configure option to refine "--with-progs"
  configure option.  Normally tack is no longer built in-tree, but
  a few packagers combine it during the build.  If term_entry.h is
  installed, there is no advantage to in-tree builds.
+ adjust configure-script to define HAVE_CURSES_DATA_BOOLNAMES symbol
  needed for tack 1.08 when built in-tree.  Rather than relying upon
  internal "_nc_" functions, tack now uses the boolean, number and
  string capability name-arrays provided by ncurses and SVr4 Unix
  curses.  It still uses term_entry.h for the definitions of the
  extended capability arrays.
+ add an overlooked null-pointer check in mvcur changes from 20170722