[sr-dev] [kamailio/kamailio] cfgutils route_if_exists causing leak (#1503)

[Daniel-Constantin Mierla]

It's rather impossible that $var(...) is leaking, but be aware that its value persists across executions of route blocks, the value is reset only by a new assign.

Then $avp() is using shared memory, so not related to pkg.stats output.

I looked at the code for `route_if_exists` and I discovered that was executing the route block as a top route, not as a sub-route (what route(x) does). I pushed a patch for it. Maybe that was the cause of leak, eventually inside the statsd operation, because route_if_exists doesn't allocate anything itself.

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