updating to gcc 13

Hi all;

with latest upgrade on my development machine gcc 9 was gone once and forever.
Avoiding to work on a VM, I've decided it's time to move on to a more recent 
gcc - that means: GCC 13.

I've worked on this task in a private branch for some time, so things almost 
went well, when updating the gcc in our toolchain.
A few packages needed patches, some old without maintenance for years that 
don't build any longer will be removed - see below.

The one and only package I'm not fine with is siproxd. Though I tried alot, I'm 
not there yet.

Why not gcc 14 you may ask.
It seems our outdated module-init-tools in toolchain won't build, I guess this 
could be  solved by replacing them with kmod.

The Packages removed are openrrcp, havp, afspfs and libcdada.

I'll commit the changes to git master.

Opinions,  questions and ideas are welcome.

regards kp