How do I unjail a validator?

If your validator has been jailed due to missing blocks then it can be unjailed with the following command:

 mantrachaind tx slashing unjail \
  --chain-id=mantra-hongbai-1 \
  --gas="auto" \
  --gas-adjustment 2 \
  --gas-prices="0.0002uom" \
  --from=<your-keys>

The gas flags should match the gas flags used when creating the validator.