editorcheck update: restrict to shell scripts and C programs for now, and removing the maximum line length check for now.

.editorconfig

@@ -4,11 +4,11 @@
 root = true
 
 # Unix-style newlines with a newline ending every file
-[*]
+[*.{sh|c}]
 end_of_line = lf
 insert_final_newline = true
 indent_style = tab
-max_line_length = 80
+#max_line_length = 80
 spaces_around_operators = true
 charset = utf-8
 trim_trailing_whitespace = true