v1.5.3

Maintenance release.

Changes:

• build-enclave selects Docker registry credentials by exact registry host. Docker Hub host aliases are treated as one registry.
• The log file is opened without following symlinks, and the CLI no longer changes its mode at runtime. Packaging creates it with the required permissions.
• The enclave process socket mode is set at bind time.
• enclave_build: move to bollard 0.21, replace serde_yaml with serde_norway, and write the ramfs config as JSON. EIF measurements for the same image are unchanged.
• Update Cargo.lock to fix cargo audit findings.
• nitro-cli-config: write the NE CPU pool as compact ranges.

Crates: aws-nitro-enclaves-cli 1.5.3, aws-nitro-enclaves-enclave-build 2.0.1.