Function SCIPsetSetRelaxfeastol 

pub unsafe extern "C" fn SCIPsetSetRelaxfeastol(
    set: *mut SCIP_SET,
    relaxfeastol: f64,
) -> f64

sets primal feasibility tolerance for relaxations (relaxfeastol)

@note Set to SCIP_INVALID to apply relaxation-specific feasibility tolerance only.

@return Previous value of relaxfeastol.