add -d (domain) option as alias to -z (zone)

bin/pdns.sh

@@ -122,7 +122,7 @@ function pdns::yesno() {
 
 function pdns:getoptions () {
   local OPTIND
-  while getopts "hbz:m:t:a:n:r:c:l:s:x" opt ; do
+  while getopts "hbz:d:m:t:a:n:r:c:l:s:x" opt ; do
     case "${opt}" in
         h ) # display help and exit
           help
@@ -142,6 +142,17 @@ function pdns:getoptions () {
             exit
           fi
           ;;
+        d ) # domain (alias of zone)
+          zone=${OPTARG,,}
+          # pdns stores zone name without trailing dot, remove if found
+          if [[ ${zone: -1} = '.' ]]; then
+            zone=${zone::-1}
+          fi
+          if ! vmail::validate_domain $zone; then
+            echo "ERROR: $zone is not a valid domain name."
+            exit
+          fi
+          ;;
         m ) # master - IP of master if this is a slave zone
           master=${OPTARG}
           ;;