Fix static analysis failures

src/freedombone-utils-monkeysphere

@@ -46,7 +46,7 @@ function install_monkeysphere {
         exit 76295
     fi
     monkeysphere-host import-key /etc/ssh/ssh_host_rsa_key "ssh://$DEFAULT_DOMAIN_NAME"
-    SSH_ONION_HOSTNAME=$(cat ${COMPLETION_FILE} | grep 'ssh onion domain' | awk -F ':' '{print $2}')
+    SSH_ONION_HOSTNAME=$(grep 'ssh onion domain' "${COMPLETION_FILE}" | awk -F ':' '{print $2}')
     monkeysphere-host import-key /etc/ssh/ssh_host_rsa_key "ssh://$SSH_ONION_HOSTNAME"
 
     if [ ! "$MY_GPG_PUBLIC_KEY_ID" ]; then