ncurses 6.1 - patch 20190223

+ fix typo in adds200 -TD
+ add tic check for consistent alternate character set capabilities.
+ improve check in mvcur() to decide whether to use hard-tabs, using
  xt, tbc and hts as clues.
+ replace check in reset command for obsolete "pt" capability using
  tbc and hts capabilities as clues (report by Nicolas Marriott).