symlink has an option's API

tiramisu/option.py

@@ -373,20 +373,19 @@ class StrOption(Option):
 class SymLinkOption(object):
     opt_type = 'symlink'
 
-    def __init__(self, name, path):
+    def __init__(self, name, path, opt):
         self._name = name
         self.path = path
+        self.opt = opt
 
     def setoption(self, config, value, who):
-        setattr(config, self.path, value) # .setoption(self.path, value, who)
+        setattr(config, self.path, value)
 
     def __getattr__(self, name):
-        if name not in ('setoption', 'getkey'):
-            raise TypeError("shall not call {0} method/attribute on "
-                "SymLinkOption {1}".format(name, self._name))
-
-    def getkey(self, value):
-        return value
+        if name in ('_name', 'path', 'opt', 'setoption'):
+            return self.__dict__[name]
+        else:
+            return getattr(self.opt, name)
 
 class IPOption(Option):
     opt_type = 'ip'