I observed that http_client drop the HTTP request after a timeout. So will be good to let LIS know Kamailio timeout.
To do this may be used `responseTime` paramer according rfc5985#section-6.1
The "responseTime" attribute MAY be included in a location request
message. The "responseTime" attribute includes a time value indicating to the LIS how long the Device is prepared to wait for a response or a purpose for which the Device needs the location.
The time value in the "responseTime" attribute is expressed as a non-
negative integer in units of milliseconds.
So we can use request body like ```xml <locationRequest xmlns="urn:ietf:params:xml:ns:geopriv:held" responseTime="4000"> <locationType exact="false"> geodetic civic </locationType> </locationRequest> ```