Guide for "Coin Splitting" in case of hard fork

[bucko13]

This guide should cover several different splitting options that we have seen recently:

1. Most important- how to split coins in the event of a fork with no replay protection (reference)
2. Cover how you would have split coins for the Bitcoin Cash fork
3. Opt-in replay protection with payment to known address

For first situation, the three approaches that should be covered:

• Replace by fee
• nLockTime
• Using miners coinbase tx

(some extra info/background here)