ports/67981: Update java/poseidon to 2.4.1

[Gerrit Beine]

Antonio Carlos Venancio Junior wrote:
>     there is nothing wrong with it. The only thing I don't understand is 
> why it's marked as restricted, since you can download it freely:
> 
Even you can download it freely, it's commercial software.
So, I asked Gentleware because of restrictions before I created the 
port. The did agree with the current state.
And that's why I don't want to change the restrictions :)

So long...

Gerrit