node: Fix false negative connection to FS chain in multi-endpoint setup #2987
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Defect of 0d08b51. Previously, node unconditionally visited all configured FS chain endpoints, and the result of the connection to the last address was final. In the case where the previous nodes (at least one) were available but the last one was not, a general init error occurred.
Now node breaks on first successful dial.
Fixes #2986.