Man pages matching name lwp::protocol::http::socketunix in section 3pm:

LWP::Protocol::http::SocketUnix.3pm.en	debian 10 / liblwp-protocol-http-socketunix-perl
LWP::Protocol::http::SocketUnix.3pm.en	debian 11 / liblwp-protocol-http-socketunix-perl
LWP::Protocol::http::SocketUnix.3pm.en	debian 12 / liblwp-protocol-http-socketunix-perl