comms/svxlink: update of qtel and svxlink port

Updated to 26.05.1
major changes from 19.09.2

26.05.1 is a security upgrade from 26.05

26.05
Most important changes since the previous release

IMPORTANT! This release may break your TCL event handler changes if they were
not done properly!

So, the TCL event handling system has been rewritten since the last release. It
has been changed to be more powerful and to better reflect the hierarchies in
the C++ code. If you have no local TCL changes you should be fine. If things
break or behave strange when you start the new version, move all your changes
out of the way so that there are no local TCL changes at all.
...
See https://github.com/sm0svx/svxlink/releases