Bug fixes for version 5_0_18

1) -pp and -ppf options were not updated after gate arrays were introduced.

2) Incorrect error message at code generation.

3) Fatal error in finvc for certain types of gate arrays.

Updates for version 5_0_18

1) New option +fin_mult_force_warn for simulator to issue warnings if

a net is forced again without being released.

2) Support for optional conditions for $setuphold and $recrem