Discussion: https://polkadot.polkassembly.io/post/1158

This proposal aims to increase the maximum number of HRMP channels from 10 to 30. Note that number of inbound and outbound channels are separate configuration and therefore this is a batch call to update both values.


Schedule a majority-carries referendum to be tabled next once it is legal to schedule
an external referendum.

The dispatch of this call must be `ExternalMajorityOrigin`.

- `proposal_hash`: The preimage hash of the proposal.

Unlike `external_propose`, blacklisting has no effect on this and it may replace a
pre-scheduled `external_propose` call.

Weight: `O(1)`

Send a batch of dispatch calls.
Unlike `batch`, it allows errors and won't interrupt.

May be called from any origin.

- `calls`: The calls to be dispatched from the same origin. The number of call must not
  exceed the constant: `batched_calls_limit` (available in constant metadata).

If origin is root then call are dispatch without checking origin filter. (This includes
bypassing `frame_system::Config::BaseCallFilter`).

# <weight>
- Complexity: O(C) where C is the number of calls to be batched.
# </weight>

- The proposal wants to increase the maximum number of HRMP channels from 10 to 30.
- Inbound and outbound channels are separate configurations.
- This change will update both values at once.
- HRMP channels are important for communication in the Polkadot network.
- The proposal is being discussed on the Polkassembly platform.

#233 Increase maximum number of HRMP channels from 10 to 30