Add ONF user and specs

[kuujo]

Added various specs created for work at ONF/Atomix:

• Distributed Lock
• Just-in-Time Paxos
• Multi-primary Replication Protocol
• P4Runtime Protocol Specification
• Raft Consensus Algorithm
• Raft Consensus Algorithm w/ Client
• Sequentially Consistent Raft Streams

I also generally tried to sort the users and specs in alphabetical order.

[lemmy]

LGTM