Update README.md (#18)

Fixes #15

README.md

@@ -9,7 +9,7 @@ To use, the contents of the ForumSsoProvider directory need to be placed into ex
 All settings should be defined prior to calling `wfLoadExtension('ForumSsoProvider');` in your LocalSettings.php
 ### Path to Forum Software
 
-    $wgSMFPath = '/path/to/smf/root/';
+    $wgFSPath = '/path/to/smf/root/';
 
 ### Forum software.  Supports smf2.0, smf2.1, elk1.0, elk1.1
 
@@ -111,4 +111,4 @@ If you are familiar with how your fork's authentication works, feel free to subm
 
 Issues or changes
 ------------------------
-If an issue has occurred, please open a new issue.  If you have a change, please submit a pull request.
+If an issue has occurred, please open a new issue.  If you have a change, please submit a pull request.