Merge pull request #592 from mhameed/master

bugfix: strip comments in drill/dig output when checking txt in dns.

getssl

@@ -1203,6 +1203,7 @@ if [[ $VALIDATE_VIA_DNS == "true" ]]; then
           elif [[ "$DNS_CHECK_FUNC" == "drill" ]] || [[ "$DNS_CHECK_FUNC" == "dig" ]]; then
             debug "$DNS_CHECK_FUNC" TXT "_acme-challenge.${lower_d}" "@${ns}"
             check_result=$($DNS_CHECK_FUNC TXT "_acme-challenge.${lower_d}" "@${ns}" \
+                           | grep -i "^_acme-challenge.${lower_d}" \
                            | grep 'IN\WTXT'|awk -F'"' '{ print $2}')
           elif [[ "$DNS_CHECK_FUNC" == "host" ]]; then
             check_result=$($DNS_CHECK_FUNC -t TXT "_acme-challenge.${lower_d}" "${ns}" \