Added
* support for welcome message required for newer versions of
  sentinel-proxy
* dependency on libczmq\_logc that integrates CZMQ logging with LogC
* configuration parsing for `nflog_group`, `socket` and `topic`

Changed
* minimal required version of LogC is now 0.2.0

Fixed
* CI: release description for automatic release creation

This actually uses configuration file for real. We allow configuration
of socket, topic and nflog group.

The additional change here is the removal of -t argument. The topic
change is available only through long option now. The reason for this is
because whole pipeline depends on default topic and topic change breaks
it. It is kind of an internal option and thus it for sure should not
have convenient short option.

The LogC changed macro names with 0.2.0 release.

This redirects czmq messages to logc. Note that at the moment this is
only redirection. The configuration is not yet propagated from
application log because LogC lacks chain implementation still.

This adds welcome message that is send as soon as possible to the
Sentinel proxy.

This also extends tests to cover sender and to cover cases when data
received are just simply invalid.

The original code was just wrong. This correctly extracts the first
block section from changelog.

Added
* support for parsing UDP and TCP protocols for IPv6 (for now without
  extensions headers)

Changed
* source files were reorganized in the repository

These are all protocols that are defined in netinet/in.h but they are
not all available on all systems. Commenting out some subset is not
exactly all right solution. This instead just wraps case with check if
macro is defined.

This is just so project is little bit better organized. We have now
sources for recorder and fwlogs itself separate.

This also changes how we load suites in unittests. We now use
constructor to auto-inject suites without having to edit unittests.c.

Added
* Initial version of fwlogs
* IPv4 TCP and UCP support
* Minimal IPv6 support