Fix errors reported by Lint check

getssl

@@ -716,7 +716,7 @@ check_config() { # check the config files for all obvious errors
     config_errors=true
   fi
 
-  if [[ validate_via_dns ]]; then # using dns-01 challenge
+  if validate_via_dns; then # using dns-01 challenge
     if [[ -z "$DNS_ADD_COMMAND" ]]; then
       info "${DOMAIN}: DNS_ADD_COMMAND not defined (whilst VALIDATE_VIA_DNS='${VALIDATE_VIA_DNS}')"
       config_errors=true
@@ -735,7 +735,7 @@ check_config() { # check the config files for all obvious errors
     if [[ "$(grep "^${d}$" "$tmplist")" = "$d" ]]; then
       info "${DOMAIN}: $d appears to be duplicated in domain, SAN list"
       config_errors=true
-    elif [[ "$d" != "${d##\*.}" ]] && ! validate_via_dns $d; then
+    elif [[ "$d" != "${d##\*.}" ]] && ! validate_via_dns "$d"; then
       info "${DOMAIN}: cannot use http-01 validation for wildcard domains"
       config_errors=true
     else
@@ -748,7 +748,7 @@ check_config() { # check the config files for all obvious errors
       DOMAIN_ACL="${ACL[$dn]}"
     fi
 
-    if ! validate_via_dns $d; then # using http-01 challenge
+    if ! validate_via_dns "$d"; then # using http-01 challenge
       if [[ -z "${DOMAIN_ACL}" ]]; then
         info "${DOMAIN}: ACL location not specified for domain $d in $DOMAIN_DIR/getssl.cfg"
         config_errors=true
@@ -1422,7 +1422,7 @@ for d in "${alldomains[@]}"; do
     ((dn++))
   else
     PREVIOUSLY_VALIDATED="false"
-    if validate_via_dns $d; then # set up the correct DNS token for verification
+    if validate_via_dns "$d"; then # set up the correct DNS token for verification
       if [[ $API -eq 1 ]]; then
         # get the dns component of the ACME response
         # get the token and uri from the dns component