Repartitioning

[Quartz]

We have an older system running 4.9 that acts as a sort of 
dev/test/scratch machine for messing around. When it was set up it we 
threw a 10gb drive in there and did a generic install with all the 
defaults. Over time, as we've used this for various stuff, we've 
realized that that partitioning scheme turned out to be decidedly non 
optimal. /usr/obj and /usr/src are eating up a gig each but only have 
2kb of data on them (this machine has never compiled anything). /home 
and /usr/local are using less than 45mb combined. Meanwhile /var was 
only set up at a few hundred megs and is bursting at the seams. Over 
half the drive's capacity is being wasted.

I'm not super familiar with how OpenBSD does disks and all of the 
caveats. How easy would it be to nuke some of these partitions and 
recombine the space? Is it something that could be done with a couple 
fdisk commands or would it involve a lot of screwing around? I've looked 
though the manual regarding fdisk and disklabel but I'm still not sure I 
really understand how everything works together.