Use indentation to increase readability

Granted, this style is definitely not common, but for the short
utility-functions of this program it's just the right choice. This
provides great flexibility, such that in the long run, it will be
possible to also share code between the OS-implementations.

This also keeps the state-keeping at a minimum and makes it clearer
which functions are implemented on which OS without having to jiggle
around with too many files in the process.

components/entropy.c

@@ -1,15 +1,18 @@
 /* See LICENSE file for copyright and license details. */
 #if defined(__linux__)
-#include <stdio.h>
+	#include <stdio.h>
 
-#include "../util.h"
+	#include "../util.h"
 
-const char *
-entropy(void)
-{
-	int num;
+	const char *
+	entropy(void)
+	{
+		int num;
 
-	return (pscanf("/proc/sys/kernel/random/entropy_avail", "%d", &num) == 1) ?
-	               bprintf("%d", num) : NULL;
-}
+		return (pscanf("/proc/sys/kernel/random/entropy_avail",
+		               "%d", &num) == 1) ?
+		       bprintf("%d", num) : NULL;
+	}
+#elif defined(__OpenBSD__)
+	/* unimplemented */
 #endif