max: Numeric, maximum value of the distribution. The distribution will be truncated at this value. Default: Inf, i.e. no maximum.
cdf_cutoff: Numeric; the desired CDF cutoff. Any part of the cumulative distribution function beyond 1 minus the value of this argument is removed. Default: 0, i.e. use the full distribution.
Returns
a <dist_spec> with relevant attributes set that define its bounds