I already have the following macro `subnet(3)` defined as the following:
| eval subnet = case(cidrmatch("$ip1$/24",src_ip), "$output_name$", cidrmatch("$ip2$",src_ip), "$output_name$")
If I call the macro multiple in the same search the value of the field it creates (also called subnet) will be overwritten by the latest values. I would like to edit the macro so that calling it multiple times appends a new value to subnet. How could I use mvappend, or another command, to accomplish this?