When creating stdscr, ensure it's placed and sized in accordance with
lines ripped off.
LINES is no longer adjusted for lines ripped off.
POSIX makes no mention that it should be adjusted.
Bottom lines are now placed correctly.
Lines ripped off are now displayed after calling initscr.
ok kamil@
Fixes PR #53635
Store ripped off lines in the SCREEN structure so we can repaint then
when the terminal is resized.
Fix mvwin(3) so it can move windows in the ripped off area.