Patch from Ned Ludd, solar at gentoo dot org:

I had previously provided you with a patch to help complete busybox's
props suite, but have heard no word back. Sense then I've made use of as
many of busybox's native API settings as I could find and would really
love for you to include support for this. If there is something more I
need to do to get this supported added in please let me know.

procps/Config.in

@@ -72,5 +72,11 @@ config CONFIG_UPTIME
 	  the system has been running, how many users are currently logged
 	  on, and the system load averages for the past 1, 5, and 15 minutes.
 
+config CONFIG_SYSCTL
+	bool "sysctl"
+	default n
+	help
+	  sysctl - configure kernel parameters at runtime
+
 endmenu