This is a proposal to change the HRMP channel deposits on Polkadot from about 20,000 DOT to 1,000 DOT. I meant to include this in motion 191 but forgot. It should be enacted at a similar time to the enactment of the v9190 or later runtime upgrade. Two notes:

1. The deposit is per one-way channel, so a bi-directional HRMP channel will require 2,000 DOT per parachain.
2. Configuration changes can take a few sessions to take effect, depending on other pending changes in the parachains protocol. Therefore, parachains should wait until the new configuration takes effect before opening channels if they want to take advantage of the lower deposit.