Package l4postgres allows the L4 multiplexing of Postgres connections With thanks to docs and code published at these links: ref: https://github.com/mholt/caddy-l4/blob/master/modules/l4ssh/matcher.go ref: https://github.com/rueian/pgbroker/blob/master/message/startup_message.go ref: https://github.com/traefik/traefik/blob/master/pkg/server/router/tcp/postgres.go ref: https://ivdl.co.za/2024/03/02/pretending-to-be-postgresql-part-one-1/ ref: https://www.postgresql.org/docs/current/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-STARTUPMESSAGE ref: https://www.postgresql.org/docs/current/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-SSLREQUEST.