This is a follow-up proposal to motion [#495](https://kusama.polkassembly.io/motion/495), which limited the number of nomination pools to 64 in Kusama (and 16 members per pool) to prevent the spread of a bug regarding the reward payout. [Runtime 9271](https://kusama.subsquare.io/democracy/referendum/225) (enacted in block #14,248,044) contains a fix for this bug, **and the staking team has observed no further issues with nomination pools.**

Therefore, this proposal aims **to lift the limits imposed on the nomination pools by motion 495**: the new limits are 256 total pools and 1024 members per pool. Recall that even these limits are just a safeguard and in practice no limit on the number of pools and members per pool exist. 

Please make sure to review the proposal hash (the construction can be found [here](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fkusama-rpc.polkadot.io#/extrinsics/decode/0x290a00000100010000000100040000)) and vote at your convenience! - preimage has already been submitted. 

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)`

Update configurations for the nomination pools. The origin for this call must be
Root.

# Arguments

* `min_join_bond` - Set [`MinJoinBond`].
* `min_create_bond` - Set [`MinCreateBond`].
* `max_pools` - Set [`MaxPools`].
* `max_members` - Set [`MaxPoolMembers`].
* `max_members_per_pool` - Set [`MaxPoolMembersPerPool`].

#534 Update to Nomination Pools on Kusama