Notice that I had to adapt to use 'rlpx_connected_peers' instead
of 'connected_peers' in 'wakunode1.nim' because due to the update
of the 'vendor/nim-eth', which adds the dependency-break with
'confutils' but also includes another changes.
Aside note: we cannot have 'confutils' dependency in 'nim-eth' because
that will prevent the generation of any waku dynamic library.
* wakunode2 config. adding new 'topic' config parameter.
This new parameter can be repeated and we are starting to deprecate the
parameter 'topics', that expected to receive a space-separated list of
pubsubtopic to subscribe to.
* Appying PR suggestions
Ivan Folgueira Bande
Alvaro Revuelta
Lorenzo Delgado