path library should include the server name in UNC roots

[nex3]

Currently the path library considers a Windows path such as "\foo\bar" to have its root as "". It should instead consider the root to be "\foo", as "foo" in this case is not a directory but the name of the server being connected to.

[munificent]

Set owner to @munificent.
Removed Area-Pub label.
Added Area-Pkg, Package-Path labels.

[nex3]

Added Library-Path label.

[nex3]

Removed Package-Path label.

[nex3]

Set owner to @nex3.
Added Started label.

[nex3]

Fixed in r30257.

---

Added Fixed label.