switch to dhtnet

CMakeLists.txt

configure.ac

contrib/src/dhtnet/libjami-testable.patch

contrib/src/dhtnet/rules.mak

meson.build

src/Makefile.am

src/account.cpp

src/account.h

src/account_config.h

src/call.cpp

src/call.h

src/client/configurationmanager.cpp

src/connectivity/CMakeLists.txt

src/connectivity/Makefile.am

src/connectivity/connectionmanager.cpp

src/connectivity/connectionmanager.h

src/connectivity/generic_io.h

src/connectivity/ice_socket.h

src/connectivity/ice_transport.cpp

src/connectivity/ice_transport.h