probably needs revisiting, because "lef write" and "lef writeall"
need handling to generate the PROPERTYDEFINITIONS block for the
PROPERTY entries to be correct.
SPICE subcircuit definitions from a netlist file and apply the port
order in the netlist to the port labels in the corresponding cell
or cells in the magic database. Also: Corrected an error in the
bloat-all code introduced in a recent commit that can cause a
segfault.