Add an ".editorconfig" file to the project

.editorconfig

@@ -0,0 +1,20 @@
+# ngIRCd -- The Next Generation IRC Daemon
+# Copyright (c)2001-2016 Alexander Barton (alex@barton.de) and Contributors.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# Please read the file COPYING, README and AUTHORS for more information.
+
+# .editorconfig: Editor settings, see <http://editorconfig.org>.
+
+root = true
+
+[*]
+indent_style = tab
+indent_size = 8
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true