@akuker The Raspian buster compiler complained:

./devices/ctapdriver.cpp: In function ‘bool br_setif(int, const char*, const char*, bool)’:
./devices/ctapdriver.cpp:45:9: error: ‘char* strncpy(char*, const char*, size_t)’ specified bound 16 equals destination size [-Werror=stringop-truncation]
  strncpy(ifr.ifr_name, bridgename, IFNAMSIZ);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

IMO the compiler is right (don't know why other compilers don't report it), because if IFNAMSIZE bytes are copied the terminating null byte would be missing. Maybe -Wextra checks for different issues with different gcc versions.
I added the fix to the branch for this PR. This had already been taken care of in a different location of ctapdriver.cpp.

We defniitely have to get rid of char arrays in favor of std::string, which is something also reported by SonarCloud.

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
19 Code Smells

30.2% Coverage
0.0% Duplication

@uweseimet - looks good. feel free to merge at your discretion.