74_THINKINGCLEANER.pm: prevent people from using roomba's own address for webhook backwards connection to FHEM

git-svn-id: https://svn.fhem.de/fhem/trunk@12321 2b470e98-0d58-463d-a4d8-8e2adae1ed80

fhem/FHEM/74_THINKINGCLEANER.pm

@@ -883,6 +883,12 @@ sub THINKINGCLEANER_Attr(@) {
         && $attrName eq "webhookHttpHostname"
         && $attrVal !~ /^([A-Za-z_.0-9]+\.[A-Za-z_.0-9]+)|[0-9:]+$/ );
 
+    return
+"Invalid value for attribute $attrName: needs to be different from the defined name/address of your Roomba, we need to know how Rooma can connect back to FHEM here!"
+      if ( $attrVal
+        && $attrName eq "webhookHttpHostname"
+        && $attrVal eq $hash->{DeviceName} );
+
     return
 "Invalid value for attribute $attrName: FHEMWEB instance $attrVal not existing"
       if (