Call management

CHANGES

src/audio/audiodriversalsa.cpp

src/audio/audiodriversoss.cpp

src/audio/audiortp.cpp

src/audio/tonegenerator.cpp

src/call.cpp

src/call.h

src/gui/qt/configurationpanelui.cpp

src/gui/qt/configurationpanelui.h

src/gui/qt/phonebookui.cpp

src/gui/qt/phonebookui.h

src/gui/qt/qtGUImainwindow.cpp

src/gui/qt/qtGUImainwindow.h

src/gui/qt/url_inputui.cpp

src/gui/qt/url_inputui.h

src/manager.cpp

src/sipcall.cpp

src/sipcall.h

src/sipvoiplink.cpp

src/user_cfg.h