squid-deb-proxy-client 0.8.15+nmu1 (amd64 binary) in ubuntu impish

 This package contains a helper for the APT http method to discover
 proxies that publish their service as _apt_proxy._tcp.
 .
 It was written to be installed on clients that should use
 squid-deb-proxy automatically, but it will work with any proxy
 that publishes the service as _apt_proxy._tcp.