ncurses 6.2 - patch 20211009

ncurses 6.2 - patch 20211009

+ implement "+m" option in tabs program.
+ fill in some details for infoton -TD
+ fix spelling/consistency in several descriptions -TD
+ use vt420+lrmm in vt420 -TD
+ modify save_tty_settings() to avoid opening /dev/tty for cases other
  than reset/init, e.g., for clear.
+ modify output of "toe -as" to show first description found rather
  than the last.
+ improve tic checks for number of parameters of smglp, smgrp, smgtp,
  and smgbp (cf: 20020525).
+ correct off-by-one comparison in last_char(), which did not allow
  special case of ":" in a terminfo description field (cf: 20120407).
+ remove check in tic that assumes that none or both parameterized and
  non-parameterized margin-setting capabilities are present
  (cf: 20101002).