change wiki/bts URLs to point to new hostname [ original upstream message ]

(stable) merge

Uppercase short option for kwfiles --all, like hg status -A Deprecate kwfiles -a.

Make kwfiles -u show untracked files only (like status) Remove extra documentation of -u/--unknown, as this is covered in the option help already. Like commands.status the code now zips the status flags. Add more kwfiles tests.