Man pages matching name tshttptxnserveraddrget in section 3ts:

TSHttpTxnServerAddrGet.3ts.en	debian 10 / trafficserver-dev
TSHttpTxnServerAddrGet.3ts.en	debian 11 / trafficserver-dev
TSHttpTxnServerAddrGet.3ts.en	debian 12 / trafficserver-dev