fsmonitor: use new dirstate APIs (issue6728)
On top of fixing fsmonitor, it moves one more "old API" use to the new one.
This needs very verbose code to save a few function calls that are very
expensive in Python.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
end_of_line = lf
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
end_of_line = lf
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false
end_of_line = lf