I'll look into this this weekend, if I get a chance. In the meantime you can always create a new script that will just restart QnetITAP, call it exec_A.sh:
#!/bin/sh
systemctl restart qnitap
Put this in your $(CFGDIR), usually /usr/local/etc, where the other exec_?.sh scripts are, Then a YOURCALL =? "_ _ _ _ _ _ A X" transmission into QnetGateway should cause QnetITAP to restart.
Tom Early