fix blossom ipv6 dialing.

fixes https://github.com/fiatjaf/nak/issues/142

fix getKindSlice() usage. keep nil when no kinds are specified.

fetch: support --auth.

git: support nostr://... URLs without requiring the <relay> component.

decode: fix missing identifiers in printed json.

Merge pull request #126 from mattn/fix/blossom-hash-decode

blossom: fix wrong source length in hex decode of download hash

update to the fact that Pool doesn't use PoolOptions anymore, just mo…

nak validate

key: a command for expanding partial keys by left-padding with zeroes.

groups: stop appending undefined tags to edit-metadata.