Merge pull request #550 from devopsdays/mattstratton/add-sysctl-docs

Add persistent sysctl changes to documentation

README.md

@@ -36,6 +36,14 @@ Then in a new window:
  $  hugo server -w --baseUrl="http://localhost:1313"
 ```
 
+A more permanent fix is to add the following to `/etc/sysctl.conf` (run `touch /etc/sysctl.conf` first if the file doesn't exist; it likely does not):
+
+```
+kern.maxfiles=20480 
+kern.maxfilesperproc=24576
+```
+...and reboot!
+
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