The "ip colocation" concept refers to the maximum allowed peers
from the same IP address. For example, we allow disabling this limit when the
node works behind a reverse proxy.
This reverts commit dc1d6ce4bf7390e23b73d96634ff87ca9341e129.
We need to revert this commit because
the waku-simulator stopped working. i.e. the nodes couldn't establish
connections among them: 054ba9e33f
Also, the following js-waku test fails due to this commit:
"same cluster, different shard: nodes connect"
* waku_lightpush/protocol.nim: minor changes to make it compile after revert
