Core Lightning v0.11.1

Highlights

• Updates upstream to v0.11.1
• Updates plugin (c-lightning-REST, summary, and rebalance) submodules
• Renames to Core Lightning
• Removes insecure cleartext external bitcoind rpc connections

What's Changed

• add synced health check by @chrisguida in #34
• convert proxy to optional dep; allow direct connection to bitcoind by @chrisguida in #35
• Update/v0.11.1 by @chrisguida in #42

Full Changelog: v0.10.2.1...v0.11.1