fix and reword README [skip ci]
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@ -148,14 +148,15 @@ All options can be passed either as command-line flags or environment variables:
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## Running multiple clusters
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## Running multiple clusters
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```suggestion
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To make a node be a member of multiple clusters, simply start multiple wesher instances.
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To make a node be a member of multiple clusters, simply start multiple wesher instances. The following settings must be explicitly set to different values for each instance:
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Each instance **must** have different values for the following settings:
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- `--interface`
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- `--interface`
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- either `--cluster-port`, or `--bind-addr` or `--bind-iface`
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- either `--cluster-port`, or `--bind-addr` or `--bind-iface`
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- `--wireguard-port`
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- `--wireguard-port`
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- `--overlay-net` (optional, but recommended to avoid node address conflicts)
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Finally, one should use different cluster keys for different clusters, as a security best practice.
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The following settings are not required to be unique, but recommended:
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- `--overlay-net` (to reduce the chance of node address conflicts; see [Overlay IP collisions](#overlay-ip-collisions))
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- `--cluster-key` (as a sensible security measure)
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## Security considerations
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## Security considerations
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