ncurses 6.2 - patch 20210220

ncurses 6.2 - patch 20210220

+ improve tic warning when oc/op do not mention SGR 39/49 for xterm
  compatible XT flag.
+ revert change to lib_addch.c in waddch_literal() from 20210130, since
  the followup fix in PutCharLR() actually corrects the problem while
  this change causes too-early filling/wrapping (report by Johannes
  Altmanninger).
+ add/use vt220+pcedit and vt220+vtedit  -TD
+ add scrt/securecrt and absolute -TD
+ add nel to xterm-new, though supported since X11R5 -TD
+ add/use xterm+nofkeys -TD
+ move use of ecma+italics from xterm-basic to xterm+nofkeys -TD