Allowed growth-parameter names for linkages in build_growth()
Source: R/0-build_srr_and_M.R
GROWTH_LINKAGE_PARAMS.RdLinear-predictor names of the underlying growth-function parameters.
Von Bertalanffy uses log_K, log_L1, log_Linf; Richards adds
log_m. The empirical weight-at-age model admits no linkages.