populate zeroconf/avahi/bonjour records via json api (#419)

* start of integrating a bonkour service browser

* some experiments

* blub

* bonjour browser via jsonrpc ...

* fix indention

* - make leddevice as component
- extend sysinfo with domain
- add more data for  bonjour browser (e.g. split domain and hostname)

* code cleanup

* add translation

* use component names instead of ids

* fix compile

libsrc/utils/SysInfo.cpp

@@ -29,6 +29,7 @@ SysInfo::SysInfo()
 	_sysinfo.productVersion = v.productVersion;
 	_sysinfo.prettyName     = v.prettyName;
 	_sysinfo.hostName       = QHostInfo::localHostName();
+	_sysinfo.domainName       = QHostInfo::localDomainName();
 }
 
 SysInfo::~SysInfo()