suggestion: double line selection option

[Neil Zanella <nzanella cs mun ca>]

Hello,

I decided to submit each feature request in a separate email.
I think the line type selection facility at the bottom of
the dia tools window is a definite improvement. The only
thing it is lacking is a double line style as drawn
below. Such notation is often used in ER diagrams
although alternative notations are also possible:

-----------------------
-----------------------

I realize double lines may cause some extra code
since correctly joining them to a connection
point requires some minor geometrical
computations effectively resulting in
having to keep track of two connection
points instead of one. I would appreciate
it if someone implemented such functionality.

Thanks,

Neil