Use sysctl config fragments to manage bcpc sysctl settings. 

I did try the sysctl cookbooks. However I wasn't easily able to get them working with our version of chef. 

I use the /etc/sysctl.d/ fragments to keep bcpc changes in our own file. On change I reload that file with sysctl -p. Note that I tried restarting the procps service in the recipe, but that returns 1 always so upsets chef. However, pro cps does seem to pic the changes up again on restart. 

I pulled the swampiness config into my way of doing it just for consistency.