* #6554 : simplify sipvoiplink

daemon/src/account.h

daemon/src/config/yamlparser.cpp

daemon/src/eventthread.cpp

daemon/src/eventthread.h

daemon/src/hooks/urlhook.cpp

daemon/src/hooks/urlhook.h

daemon/src/iax/iaxaccount.cpp

daemon/src/iax/iaxaccount.h

daemon/src/iax/iaxvoiplink.cpp

daemon/src/iax/iaxvoiplink.h

daemon/src/logger.h

daemon/src/main.cpp

daemon/src/managerimpl.cpp

daemon/src/managerimpl.h

daemon/src/managerimpl_registration.cpp

daemon/src/preferences.cpp

daemon/src/sip/sipaccount.cpp

daemon/src/sip/sipaccount.h

daemon/src/sip/sipvoiplink.cpp

daemon/src/sip/sipvoiplink.h