Skip symlinks in storage/filesystem

Author: dilyanpalauzov

vdirsyncer/storage/filesystem.py

@@ -53,7 +53,7 @@ def discover(cls, path, **kwargs):
 
     @classmethod
     def _validate_collection(cls, path):
-        if not os.path.isdir(path):
+        if not os.path.isdir(path) or os.path.islink(path):
             return False
         if os.path.basename(path).startswith('.'):
             return False