pacparser(3) on Linux
The text bf525e15468b, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
Library to parse proxy auto-confg (PAC) files. API for pacparser library, a library to use proxy auto-config (PAC) files. See project homepage: http://github.com/pacparser/pacparser for more information.