Use default group instead

Author: jimmo

Makefile

@@ -311,7 +311,7 @@ tftpd_start:
 	sudo true
 	@if sudo which atftpd >/dev/null ; then \
 		echo "Starting aftpd"; \
-		sudo atftpd --verbose --bind-address $(TFTP_IPRANGE).100 --daemon --logfile /dev/stdout --no-fork --user $(shell whoami) --group $(shell whoami) $(TFTPD_DIR) & \
+		sudo atftpd --verbose --bind-address $(TFTP_IPRANGE).100 --daemon --logfile /dev/stdout --no-fork --user $(shell whoami) --group $(shell id -gn) $(TFTPD_DIR) & \
 	elif sudo which in.tftpd >/dev/null; then \
 		echo "Starting in.tftpd"; \
 		sudo in.tftpd --verbose --listen --address $(TFTP_IPRANGE).100 --user $(shell whoami) -s $(TFTPD_DIR) & \