Script changes for images in /dev/rbd-pve and ceph pools with underscore

[syrexjohnson]

Hi,

Thanks for your work on this script. We had some errors using it on our clusters. We made the following changes:

[admin@kvm1 crossover]# diff crossover.new crossover
88c88
< declare -r recephimg='([a-zA-Z0-9_]+)\:(.*)'
---
> declare -r recephimg='([a-zA-Z0-9]+)\:(.*)'
865c865
<     image_spec=$(pvesm path "$disk" | grep '^/dev/rbd/\|^/dev/rbd-pve/' | sed -E "s/(^\/dev\/rbd\/|^\/dev\/rbd-pve\/[0-9a-fA-F]{8}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{12}\/)//")
---
>     image_spec=$(pvesm path "$disk" | grep '^/dev/rbd/' | sed -e "s/^\/dev\/rbd\///")

The first change allows for underscore character in the ceph RBD pool name when doing the snapshot transfer. The second allows for snapshot creation if the pools are in /dev/rbd-pve.