[MAJOR] frontend: don't initialize the server-side stream_int anymore

The frontend has no reason to initialize the server-side stream_interface.
It's a leftover from old times which now makes no sense due to the fact
that we don't know in the frontend whether the other side will be a socket,
a task or anything else. Removing this part is possible due to previous
patches which perform the initialization at the proper place. We'll still
have to be able to register an I/O handler for situations where everything
is known only to the frontend (eg: unix stats socket), before merging the
various instanciations of this accept() function.
1 file changed