forget: use forward slashes for internal paths
forget into a subrepo failed on windows because pathes were joined with \.
check-code: add --nolineno option for hiding line numbers
This makes the output more stable when it is used as a whitelist.
merge: give a special message for internal:merge failure (
issue3105)
subrepo: use correct paths for subrepos with ..-relative paths on windows
posixpath normpath of c:\foo\bar/../baz is baz, so now we pconvert first.