Comment 7 for bug 1752361

Implemented the walking code.
Also adding this as another case (that can't be translated / accessed):
        <interface type='vhostuser'>
            <model type='virtio'/>
            <source type='unix' path='/nothing/of/this/exists' mode='server'/>
        </interface>

Generates:
  "/run/symlinkdisk-doesexist" rwk,
  "/run/symlinkdisk-doesnotexist" rwk,
  "/run/symlinksocket-doesexist" rw,
  "/run/symlinksocket-doesnotexist" rw,
  "/run/pathdoesnotexist/symlinksocket" rw,
  "/run/symlinknet-doesexist" rw,
  "/run/symlinknet-doesnotexist" rw,
  "/nothing/of/this/exists" rw,

Which is exactly what we want.

Will look at syntax/style checks after lunch...