examples/gcoap-rust: Expose more functionality · RIOT-OS/RIOT@3ad4fea

Commit message is longer than 50 (but < 72) characters: "examples/rust-gcoap: Add ping, passive ping and nib resources"

Commit message is longer than 50 (but < 72) characters: "examples/rust-gcoap: Update external module dependency"

Commit message is longer than 50 (but < 72) characters: "examples/rust-gcoap: Use patched try-lock version for armv6 devices"