 [CA-115411] Skip XS_* responses that are not supported in the windows frontend.
 [CA-115411] Skip XS_* responses that are not supported in the windows frontend.

Add a warning displaying the type, but otherwise do nothing with unknown responses.
(v2) Updated whitespace/tabbing and capitalization

Signed-off-by: Owen Smith <ff5e3d9c9f82290ce2a1ee2b399fd0e8322eba85@citrix.com>

xenserver/win-xenbus,omeg/xenbus,QubesOS/qubes-vmm-xen-win-pvdrivers-xenbus,omeg/xenbus,xenserver/win-xenbus,xenserver/win-xenbus,MarkKMueller/xenbus,xenserver/win-xenbus,rneilturner/xenbus,rneilturner/xenbus,rneilturner/xenbus,QubesOS/qubes-vmm-xen-win-pvdrivers-xenbus,MarkKMueller/xenbus,MarkKMueller/xenbus,omeg/xenbus,QubesOS/qubes-vmm-xen-win-pvdrivers-xenbus