[Bug] VFN can't state sync from other VFNs if it receives 3 inbound connections

Bug

VFNs connect to 3 other VFNs in order to state-sync if it loses its connection to its own validator. However it will only state sync on an outbound connection. If the VFN happens to receive 3 inbound connections from other VFNs it won't make additional outbound connections. In this case if it loses connectivity to its own validator it won't state sync.

Detected on big testnet when val0 validator was stopped to test restore. The val0 vfn stopped syncing.

Expected Behavior

VFN should be able to state sync regardless of connection directions.

System information

Please complete the following information:

• 3f7de435