Wrong parsing of IPv6 address in dfdaemon

[PKizzle]

Bug report:

grpclog/grpclog.go:37	[core][Channel #683] Channel created
grpclog/grpclog.go:37	[core][Channel #683] original dial target is: "[fd01:0:0:2::52eb]:8002"
grpclog/grpclog.go:37	[core][Channel #683] dial target "[fd01:0:0:2::52eb]:8002" parse failed: parse "[fd01:0:0:2::52eb]:8002": first path segment in URL cannot contain colon
grpclog/grpclog.go:37	[core][Channel #683] fallback to scheme "passthrough"
grpclog/grpclog.go:37	[core][Channel #683] parsed dial target is: {Scheme:passthrough Authority: URL:{Scheme:passthrough Opaque: User: Host: Path:/[fd01:0:0:2::52eb]:8002 RawPath:/[fd01:0:0:2::52eb]:8002 OmitHost:false ForceQuery:false RawQuery: Fragment: RawFragment:}}
grpclog/grpclog.go:37	[core][Channel #683] Channel authority set to "[fd01:0:0:2::52eb]:8002"

Expected behavior:

No error message should be output as the IPv6 address is correctly parsed and only the last colon outside the square brackets is considered a delimiter for the port.

How to reproduce it:

1. Run dragonfly in a IPv6 enabled kubernetes cluster
2. Enable console output for dfdaemon
3. Check the console output for dfdaemon

Environment:

• Dragonfly version: v2.1.0-beta.1
• OS: Raspberry Pi OS (Debian)
• Kernel: 6.1.21-v8+ aarch64 GNU/Linux
• Redis: 7.2-rc2

[embroede]

I have seen this as well with IPv4, the same error message "first path segment in URL cannot contain colon"

@gaius-qi @jim3ma