#576 - fix the EVENT_CONSOLE_CARET issue.. Wrongly read the X, Y coordinates
#575 - when backspace key is pressed then screen is not refreshed correctly
#574 - when delete key is pressed then screen is not refreshed correctly (the last character is repeated in the end)
#573 - while using up/down arrows, screen is not refreshed correctly (there are some left over characters of bigger command)
#572 - clear screen is not clearing the whole console
#571 - Move the cursor to top of visible window so that nothing will be erased on the console.
#570 - code cleanup for console related logic
#569 - wrong implementation of TIOCGWINSZ. This is causing lot of issues when windows open ssh client is connecting to linux ssh server.
#568 - Scrolling issue when the cursor is at the last line of the visible window.
#567 - Logic to pass the raw buffer to console is wrong.
https://github.com/PowerShell/Win32-OpenSSH/issues/176
1.If there are no sufficient permissions to open a file then _wstat64() is returning file not present but it should return the accessed denied.Fixed this.
2.Code cleanup in the posix compat files to align with the openbsd coding standard.
