[sr-dev] [kamailio/kamailio] Wkampich/dev (#2675)

[Wolfgang Kampichler]

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#### Pre-Submission Checklist
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in `doc/` subfolder, the README file is autogenerated)

#### Type Of Change
- [x] Small bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds new functionality)
- [ ] Breaking change (fix or feature that would change existing functionality)

#### Checklist:
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- [ ] PR should be backported to stable branches
- [x] Tested changes locally
- [x] Related to issue #2574 and #2641

#### Description
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lost: new features, attributes and a new function to dereference location
- features: LoST redirect, dynamic HELD url resolving (#2574), LoST NAPTR,
  POST request to dereference loation 
- attributes: reponse_time (-1:emergencyDispatch, 0:emergencyRouting, >0[ms]);
  post_request (POST method to dereference location #2641); recursion (1:yes/0:no);
  location_profile (PIDF/LO profile selection: 0:first/1:last/2:geo/3:civic);
  verbose 0/1 (detailed LoST response as log INFO);
  geoheader_type (filter schema: 0:any/1:cid/2:http/3:https);
  geoheader_order (0:first/1:last)
- function: lost_held_dereference (specific function to dereference location
  using POST method); attributes are url (r;string), resp.-time (r;string),
  resp.-type (r;string),  pidf (r/w;string) and error (r/w;string)
- general: The extension of the module allows dynamic querying of LIS/HELD
  and LOST services via NAPTR lookup. In the case of LOST, a redirect
  response is evaluated. In case a lost_held_request (used to connect
  to a LIS via POST or GET) is passed with an empty string ("") for the
  connection parameter, then P-A-I or From header value hostnames are used
  for NAPTR lookup to get a corresponding service.

http_client: http_client_request (api) content-type header support
- new api call including a content-type argument implemented as new
  function - required to resolve geolocation url using POST (#2641)
- Note: not sure if this is the most elegant solution, but it helps
  to avoid backward compatibility issues

You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/2675

-- Commit Summary --

  * http_client: http_client_request (api) content-type header support
  * lost: new features, attributes and a new function to dereference location

-- File Changes --

    M src/modules/http_client/curl_api.c (1)
    M src/modules/http_client/curl_api.h (3)
    M src/modules/http_client/functions.c (68)
    M src/modules/http_client/functions.h (14)
    M src/modules/lost/functions.c (902)
    M src/modules/lost/functions.h (3)
    M src/modules/lost/lost.c (88)
    A src/modules/lost/naptr.c (255)
    A src/modules/lost/naptr.h (38)
    M src/modules/lost/pidf.c (5)
    A src/modules/lost/response.c (991)
    A src/modules/lost/response.h (131)
    M src/modules/lost/utilities.c (447)
    M src/modules/lost/utilities.h (27)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/2675.patch
https://github.com/kamailio/kamailio/pull/2675.diff

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