* add support for choosing a peer key type (e.g. RSA or Ed25519) when initializing the repo
* test all variants of ipfs init: RSA, Ed25519 and default
* update subdomain gateway sharness test to publish IPNS using RSA and
Ed25519 keys
* use default identity bit lengths defined in config repo instead of
having separate defaults in go-ipfs
* update config repo dependency
Co-authored-by: Will Scott <will@cypherpunk.email>
Co-authored-by: Petar Maymounkov <petarm@gmail.com>
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