Add emulators/fs-uae-devel port. This requires variables in the master port
emulators/fs-uae to be overridden and that change is included in this patch.
In general, I'm not sure -devel ports are usually slave ports, slave ports are more often to have ports with different options, such as nox11 variants. You also need to check with the owner of the original port for approval, since you're touching that one. You also need do add CONFLICTS since I assume both ports can't be installed at the same time (installing things in the same place).
Had I done it, I'd probably done svn cp of fs-uae to fs-uae-devel and created a separate port.
Use your @f.o mail address. If you own other ports, those should probably be updated as well.