Merge branch '4.19' into no-zone

Author: abh1sar

api/src/main/java/org/apache/cloudstack/api/command/user/firewall/CreateFirewallRuleCmd.java

@@ -19,6 +19,8 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.commons.collections.CollectionUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.log4j.Logger;
 
 import org.apache.cloudstack.acl.RoleType;
@@ -103,14 +105,13 @@ public String getProtocol() {
 
     @Override
     public List<String> getSourceCidrList() {
-        if (cidrlist != null) {
+        if (CollectionUtils.isNotEmpty(cidrlist) && !(cidrlist.size() == 1 && StringUtils.isBlank(cidrlist.get(0)))) {
             return cidrlist;
         } else {
-            List<String> oneCidrList = new ArrayList<String>();
+            List<String> oneCidrList = new ArrayList<>();
             oneCidrList.add(NetUtils.ALL_IP4_CIDRS);
             return oneCidrList;
         }
-
     }
 
     // ///////////////////////////////////////////////////