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.

include/sudo_util.h

@@ -23,7 +23,7 @@
 #ifdef HAVE_STDBOOL_H
 # include <stdbool.h>
 #else
-# include "compat/stdbool.h"
+# include <compat/stdbool.h>
 #endif /* HAVE_STDBOOL_H */
 
 #ifdef __TANDEM