ncurses 6.2 - patch 20210718

ncurses 6.2 - patch 20210718

+ correct typo in "vip" comments (report by Nick Black), reviewed this
  against Glink manual -TD
+ fill in some missing pieces for pccons, to make it comparable to the
  vt220 entry -TD
+ modify mk-1st.awk to account for extra-suffix configure option
  (report by Juergen Pfeifer).
+ change default for --disable-wattr-macros option to help packagers
  who reuse wide ncursesw header file with non-wide ncurses library.
+ build-fix for test/test_opaque.c, for configurations without opaque
  curses structs.