rust-sequoia-rfc2822 0.9.0 RFC 2822 name-addr parser

Currently, this crate only recognizes the RFC 2822 name-addr and addr-spec productions, i.e., things of the form: Name (Comment) <email@example.org> and email@example.org

Although the above appear simple to parse, RFC 2822's whitespace and comment rules are rather complex. This crate implements the whole grammar.