Improved dos2unix calls

now greps for any shell scripts featuring carriage returns, builds a list, passes to xargs to pass to dos2unix

Means that it doesn't run dos2unix unless it absolutely has to.

host/bin/start.sh

@@ -150,9 +150,9 @@ elif [ "${NETWORK_TAG}" != "${LOCAL_TAG}" -o "$2" == "force" ]; then
 	chmod 777 *.sh
 	#grab dos2unix from the package manager if not installed
 	command -v dos2unix >/dev/null 2>&1 || { apt-get install --yes --force-yes dos2unix >&2; }
-	dos2unix *.sh
+	grep -lU $'\x0D' *.sh | xargs dos2unix
 	#ensure the cwhservice always is linux format and executable
-	dos2unix /etc/init.d/cwhservice
+	grep -lU $'\x0D' /etc/init.d/cwhservice | xargs dos2unix
 	chmod +x /etc/init.d/cwhservice
 	rm ${DL_FILE}
 else