Change to single partition AFTER installation

You can change OpenBSD to run using a single partition after doing a default installation. You might rightly ask why on earth you would want to do this, after all the FAQ “encourages users to split their disk into a number of partitions”. Well it’s great if you have a large disk and in a secure implementation but what if you just want to run on a single partition to make better use of the disk or virtual disk space.