allows the user to specify that bottomhole pressure values for all, or for
specified, wells running on rate, drawdown, or implicitly imposed well head pressure
constraints should be reinitialized before every timestep or before every Newtonian iteration.
Both particular well initialization frequencies, which are entered for a particular well or set of
wells named in a list, and a global initialization frequency, which applies to wells for which
no particular frequency has been set, can be set using *WELLINIT.