Kvarn utils

This is a collection of HTTP utilities used in the Kvarn web server.

Some miscellaneous Rust utilities are also housed here.

See doc.kvarn.org for the most up-to-date docs.

lib.rs:

Utility functions for web application development.

This includes

• commonly used [chars],
• a [build_bytes] macro to create a [Bytes] from bytes slices with one allocation,
• [WriteableBytes] to optimize performance when creating a new [Bytes] of unknown length,
• [hardcoded_error_body] to get a hard-coded error response.
• [CleanDebug] and it's trait [AsCleanDebug] to get a [Debug] implementation wired to the item's [Display] implementation.