Documentation: Correct claims about Debian packaging.
The documentation reported the union of all possible Debian- and
Debian-derived packaging.  This isn't realistic: there are differences
between OVS upstream, Debian downstream, and Ubuntu downstream.  This
commit distinguishes them.
Reported-by: Ravi Kerur
@@ -44,10 +44,13 @@ that includes the core userspace components of the switch.
2. For kernel datapath, ``openvswitch-datapath-dkms`` can be installed to
automatically build and install Open vSwitch kernel module for your running
-kernel.
+kernel. This package is only available when the .deb packages are built from
+the Open vSwitch repository; it is not downstream in Debian or Ubuntu releases.
3. For fast userspace switching, Open vSwitch with DPDK support is
-bundled in the package ``openvswitch-switch-dpdk``.
+bundled in the package ``openvswitch-switch-dpdk``. This package is only
+available in the Ubuntu distribution; it is not upstream in the Open vSwitch
+repository or downstream in Debian.
Fedora
------
