[pstricks] not backwards compatible

[Gene Ressler]

> Daan Krammer schrieb:
> 
> > Moreover, I would be very grateful if people would be able to
> > make things backwards compatible again. I've got lots of pstricks
> > pictures involving dashed lines and I am worried I will need to
> > file two versions of them, one for each update. Perhaps though,
> > the damage that has already been done cannot be undone, by
> > definition (you can't make incompatible command syntaxes
> > compatible).
> 
> Example please ...
> 
> Hebrert
> 

The previous way of setting linejoin was with pstverb.  When the new
linejoin was implemented, the pstverb commands stopped working, and all old
pstricks code had to be updated.

I also appreciate all the work Herbert does.  This isn't a complaint, just a
note to answer Herbert's question.