vshReadlineParse: Use string list
vshReadlineParse: Use string list

It's better to fetch list of either commands or options just once
and then iterate over it. Moreover, it makes future completers
way simpler as they will return string lists too.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

eskultety/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,zippy2/libvirt,eskultety/libvirt,jfehlig/libvirt,olafhering/libvirt,nertpinx/libvirt,jardasgit/libvirt,libvirt/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,olafhering/libvirt,crobinso/libvirt,nertpinx/libvirt,libvirt/libvirt,nertpinx/libvirt,jardasgit/libvirt,crobinso/libvirt,jardasgit/libvirt,olafhering/libvirt,crobinso/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,andreabolognani/libvirt,libvirt/libvirt,olafhering/libvirt,nertpinx/libvirt,nertpinx/libvirt,eskultety/libvirt,crobinso/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,andreabolognani/libvirt,libvirt/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,eskultety/libvirt,zippy2/libvirt,eskultety/libvirt,andreabolognani/libvirt