upnp: port mapping provisioning for srflx candidates

contrib/src/pjproject/0007-pj_ice_sess.patch

contrib/src/pjproject/package.json

contrib/src/pjproject/rules.mak

src/account.h

src/client/configurationmanager.cpp

src/ice_transport.cpp

src/ice_transport.h

src/jamidht/jamiaccount.cpp

src/jamidht/jamiaccount.h

src/sip/sipaccount.cpp

src/sip/sipcall.cpp

src/sip/sipcall.h

src/upnp/protocol/global_mapping.h

src/upnp/protocol/igd.cpp

src/upnp/protocol/igd.h

src/upnp/protocol/mapping.cpp

src/upnp/protocol/mapping.h

src/upnp/protocol/natpmp/nat_pmp.cpp

src/upnp/protocol/natpmp/nat_pmp.h

src/upnp/protocol/pupnp/pupnp.cpp