Evaluate the chosen HCR function using the current stock perception and a control
ices.hcr(stk, fmin, ftrg, blim, bsafe, args, tracking)
The perceived FLStock.
Name of the chosen HCR function.
Effort array (if effort management is being used).
A list with the elements fmin, ftrg, blim, bsafe and ssb_lag, all of which are numeric.
The year for which the target F is set, based on the SSB in year (ay - control$ssb_lag).