In terms of "hotspot" terminology, what it does is, quote from author of the script:
"it bridges the two interfaces but uses NAT to achieve it" -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/6b5e42ea-e2dc-420d-933a-3c591b75639d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
