net.tcp.service[ntp]
has existed for a long time, it almost never worked, because it tried to probe NTP protocol over TCP. It was rewritten to work over UDP and it now works.A check for valid reference has been added for global regular expressions in LLD rules. If entered reference is not valid, due to misspelling or missing referenced global regular expression, the respective LLD rule will become unsupported and appropriate error message will be displayed.