libdatachannel source: https://github.com/paullouisageneau/libdatachannel/tree/443f6934d9007eb7076ab7825ba330f355fcbead
Dependencies libjuice, usrsctp, plog and json use the submodule commits recorded at that revision.
Mbed TLS source: https://github.com/Mbed-TLS/mbedtls/tree/068ff080b369adfac81509f9b57b2afabaf82dc5
These upstream sources are built without source modifications.
