for easier configuration of multiple servers on the same machine,
FRAPPY_* env. variables are overriding the values from the
general config file
+ apply expanduser where approporiate
Change-Id: Icb73543402f5fb1b8a248a8b8d7fb470971492f4
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/29351
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>