GRHD: Use a dedicated cold EoS as a fallback in c2p
This adds new parameters to the GRHD
section:
-
c2p_cold_eos_parameters
: Contains parameters for thePolytrope
EoS that is used as a fallback in c2p.
This kind of 'abstraction' is needed so that we can re-purpose this c2p for the SRHD project.