Expand payload path on access

Author: rastating

payloads/custom.rb

@@ -21,7 +21,7 @@ def encoded
     end
 
     def raw
-      File.open(datastore['payload_path'], 'rb', &:read)
+      File.open(File.expand_path(datastore['payload_path']), 'rb', &:read)
     end
   end
 end