[#2623] Clean up: LOCAL_ADDRESS configuration field no usefull anymore

sflphone-client-gnome/src/config/accountconfigdialog.c

sflphone-client-gnome/src/config/assistant.c

sflphone-client-gnome/src/config/preferencesdialog.c

...-client-gnome/src/dbus/configurationmanager-introspec.xml

sflphone-client-gnome/src/dbus/dbus.c

sflphone-client-gnome/src/sflphone_const.h

sflphone-common/src/account.h

sflphone-common/src/dbus/configurationmanager-introspec.xml

sflphone-common/src/dbus/configurationmanager.cpp

sflphone-common/src/dbus/configurationmanager.h

sflphone-common/src/managerimpl.cpp

sflphone-common/src/managerimpl.h

sflphone-common/src/managerimpl_registration.cpp

sflphone-common/src/sip/sipaccount.cpp

sflphone-common/src/sip/sipaccount.h

sflphone-common/src/sip/sipvoiplink.cpp