Multiverse/Multiverse-Portals — pull request #126 by gmcnew (2012-03-01 03:53:28+00:00)
Title: Add an option to fill portals with air on removal.

When useonmove is false, users have to set a portal on fire and then stand in the portal block for a few seconds, just like it's a nether portal.

If the portal is removed ("/mvp remove"), those portal blocks will persist unless the remover tears the frame down. If this removed portal is used by a player who doesn't know it's been removed, they'll expect to go one place and find themselves in the Nether instead.