This delegates the construction of the server Endpoint object to the i2p/tor
Provider, which can use the i2p/tor section of the config file to add options
which would be awkward to express as text in an endpoint descriptor string.
refs ticket:2889 (but note this merely makes room for a function to be
written that can process I2CP options, it does not actually handle such
options, so it does not close this ticket yet)
We use it for two things: to create the foolscap connection handler, and
to possibly start an .onion listener at startup.
This also updates node._common_config_sections to accept the new tor
settings written by create-node/create-introducer.
I think the preferred way to listen on both IPv4 and IPv6 will be to use
"--port=tcp:PORT,tcp6:PORT". This is now reflected in the docs.
refs ticket:867
We now use::
tub.port = disabled
tub.location = disabled
instead of using an empty value (but the key still being present, since
if the key is missing entirely, that means "be automatic").
closes ticket:2816
Updated config docs. Added errors if we're not listening but were told
to enable storage, helper, or if we're the Introducer server.
closes ticket:2816
This can be done synchronously because we now know the port number
earlier. This still uses get_local_addresses_sync() (not _async) to do
automatic IP-address detection if the config file didn't set
tub.location or used the special word "AUTO" in it.
The new implementation slightly changes the mapping from tub.location to
the assigned location string. The old code removed all instances of
"AUTO" from the location and then extended the hints with the local
ones (so "hint1:AUTO:hint2" turns into "hint1:hint2:auto1:auto2"). The
new code exactly replaces each "AUTO" with the local hints (so that
example turns into "hint1:auto1:auto2:hint2", and a silly
"hint1:AUTO:AUTO" would turn into "hint1:auto1:auto2:auto1:auto2"). This
is unlikely to affect anybody.
