Return support of 90210 code

[Gennady Trafimenkov]

In some versions of the original game (for example, Russian and Russian Gold) it was possible to enter code 90210 instead of xep624 and get previously generated IMP character.

This is not supported in JA2-Stracciatella at the moment.

Return support of it back. It wouldn't hurt anyone.

Reported by https://bitbucket.org/alex_weil