GitLab

 - Use size_t instead of unsigned int for offset.
 - Add function to enable marshal check at runtime.
 - Enable marshal check in unit tests.

 - Use our own implementation of snprintf() called belle_sip_snprintf() to handle the various native implementations whose return values are not consistent.
 - Simplify error handling in marshalling.

optimize to_string mechanism.

* fix many bugs and crashes:
  - rport shall not be set if not present in the request
  - received shall not be set if identical to via's host
  - belle_sip_response_get_return_hop() wasn't working without received parameter
  - belle_sip_response_get_return_hop() wasn't working if no rport and no port (that is default port to be used).

moment.

document object memory management.

implement garbage collection of floating objects.

Header name parsing is nno longuer case sensitive

remove qop from default authorization