[sr-dev] [kamailio/kamailio] http_client: http_connect_raw (#1763)

[Julien Chavanton]

similar to http_connect for http/post, however the data parameter is not PV parsed
this way json and any other content can be used without any escaping

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#### Description
I have ran into the issue, where a dollar sign was present in the data  : 

https://lists.kamailio.org/pipermail/sr-dev/2009-March/000898.html
```
Try to replace $ with $$ inside the $var(data), something like:

$var(m) = "$";
$var(r) = "$$";
$var(newdata) = $(var(data){s.replace,$var(m),$var(r)});
```
This fix is working, but I thought others could fell into this pitfall and have builtin way to send raw data over http could be best.

By adding a module command to send `http_connect_raw()`

I wonder if this should be called something else ...
You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/1763

-- Commit Summary --

  * http_client: http_connect_raw

-- File Changes --

    M src/modules/http_client/doc/http_client_admin.xml (63)
    M src/modules/http_client/http_client.c (99)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/1763.patch
https://github.com/kamailio/kamailio/pull/1763.diff

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