Daemon hardening

https://wiki.debian.org/Hardening

root@iqdgw01-024226387aafe1bc:/home/iqrf# hardening-check /usr/bin/iqrfgd2
/usr/bin/iqrfgd2:
 Position Independent Executable: yes
 Stack protected: yes
 Fortify Source functions: no, only unprotected functions found!
 Read-only relocations: yes
 Immediate binding: no, not found!
root@iqdgw01-024226387aafe1bc:/home/iqrf#

• remove warnings