Re: [sr-dev] [kamailio/kamailio] extensions to lost and http_client modules (#2675)

tested config ``` listen=udp:127.0.0.1:5060 loadmodule "xlog.so" loadmodule "pv.so" loadmodule "http_client.so" loadmodule "lost.so" loadmodule "textopsx.so" modparam("lost", "exact_type", 1) modparam("lost", "post_request", 1) modparam("http_client", "httpcon", "lostsrv=>http://api.example.com/api/lost"); request_route { $var(res) = lost_query("lostsrv", "$var(uri)", "$var(name)", "$var(err)"); xlog("L_INFO", "LOST findService: Result code $var(res)\nUri: $var(uri)\nName: $var(name)\n"); } ``` Test with one `Geolocation` header. LOST request send with HTTP headers like ``` POST /api/lost HTTP/1.1 Host: api.example.com User-Agent: kamailio (5.5.0-pre0 (x86_64/linux)) Accept: */* Content-Type: application/lost+xml;charset=utf-8 Content-Length: 526 ``` Here may be updated ``` Accept: application/lost+xml ```

Also in Kamailio console, I can see this error message when `Geolocation` passed as a value ``` 1(82) ERROR: <core> [core/parser/parse_body.c:510]: part_multipart_headers_cmp(): error code: "-9" error text: "We reached the end of the buffer". ``` Looks as here here "ERROR" level misslead. My test SIPp script attached. [test_call.xml.gz](https://github.com/kamailio/kamailio/files/6255191/test_c… The script may be started using the command ``` sipp -m 1 -sf test_call.xml -p 2345 127.0.0.1 ```