.editorconfig

phabricator: register config settings

I didn't bother registering the deprecated phabricator.auth.*, and I'm not sure
if the two flagged as 'developer config' should be moved to [devel] (or why
there's a distinction between `repophid` and `callsign`).

# See http://EditorConfig.org for the specification

root = true

[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true

[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true