Add udp2udp application to the project

See merge request !270

Fixed include strings.h in yamlparse.c

See merge request !269

Fix signed/unsigned comparison statements.

See merge request !268

The header <strings.h> is not standard. It is specific to most UNIX
and is a superset of <string.h> (without 's'). On Windows with Visual
Studio, the compilation fails with <strings.h>. Fixed as <string.h>.

The fixed statements use rist_send_seq_rtcp return value to check errors

check that brew exists before calling

Closes #192

See merge request !267

Add receiver session timeout API callback and command line option for exit on session timeout

See merge request !265

Add peers figures to receivers statistics.

See merge request !263

Fixed a memory leak caused by authentication failures.

See merge request !262

Add config file support for ristsender and ristreceiver.

See merge request !264

The file needs to be in yaml format, here is an example:
---
secret: blarg
buffer: 0
encryption-type: 256
profile: <simple/main/advanced>
stats: 1000
inputurl:
  - <URL A>
  - <URL B>
  - ...
outputurl:
  - <URL A>
  - <URL B>
  - ...
We used a built-in very simplistic native yaml parser and not a yaml library to not introduce a new dependency. The key-value pairs are the same ones used in the long-options of the command line (all are supported).

Flow timeout

See merge request !261

Merge latest dev branch

Closes #178

See merge request !260

Enhance test app to have a random number of null segments and also check for content accuracy on every segment

Refactor null packet deletion to be fully compliant with the spec. No more assumptions of where the nulls can be.

Fix bug in sender rtt prometheus stats. They should be displayed in units of second and not millisecond
Closes #178

Force authenticator to use derived key when no encryption passphrase is provided.

See merge request !259

Fix new NPD test: we cannot repeat port numbers or the tests interfere with each other as they are executed in parallel

This commit fixes an encryption issue preventing the communications:
when no encryption passphrase is provided, the authenticator requests
the authenticatee to use a derived password but does not apply this recommendation
to itself as it should.

Null packet deletion fix: do not assume we have 7 mpegts segments per packet during null restoration.

Enhance test application: 1- Use random packet sizes. 2- Emulate mpegts and check sync bytes. 3- Add tests for null packet deletion mode.

Fix authentication issue in release builds.

See merge request !258

Fix building srp_examples.c with musl

See merge request !257

assert macros prevent the code from being executed when compiling for
release targets.