Use #include <foo.h> instead of #include "foo.h" in most cases.

We rely on the include path to find many of these headers.  It
especially doesn't make sense to use #include "foo.h" for headers
in the top-level include directory.

plugins/sudoers/editor.c

@@ -30,7 +30,7 @@
 #include <unistd.h>
 #include <errno.h>
 
-#include "sudoers.h"
+#include <sudoers.h>
 
 /*
  * Non-destructive word-split that handles single and double quotes and