Orthogonal style connectors

[Bug Importer]

There should be possible to make connectors between two
objects in form of zigzagline. (Like in dia)

[Wilsonronl (wilsonronl)]

I like how Inkscape connectors currently work. An option to
create zig-zag style connectors would also be nice.

Yes, I know Dia does that, but I think Inkscape is a much
better drawing tool, over all.

[Michael Wybrow (mjwybrow)]

I'm working on this as on of my research areas. As soon as
I add it into libavoid it will be in Inkscape too.

[ScislaC (scislac)]

Since these exist in branch for this year's SoC, I am marking as fix committed (yes, we don't normally use this designation, but it seems suitable in this case)