Note that require.paths is gone in 0.5

Rather than say it "may disappear", let's just be clear that it *has*
disappeared, and exactly how long it'll be supported for.

doc/api/modules.markdown

@@ -248,9 +248,10 @@ Loading from the `require.paths` locations is only performed if the
 module could not be found using the `node_modules` algorithm above.
 Global modules are lower priority than bundled dependencies.
 
-#### **Note:** Please Avoid Modifying `require.paths`
+#### **Note:** Please Avoid Using `require.paths`
 
-`require.paths` may disappear in a future release.
+`require.paths` will only be supported through the end of the v0.4
+stable branch.  It is removed from node as of v0.5.
 
 While it seemed like a good idea at the time, and enabled a lot of
 useful experimentation, in practice a mutable `require.paths` list is