Get remote host in the process that accept() and pass it through
the REMOTE_ADDR environment variable to the handler-process.
Introduce the REMOTE_PORT environmen variable for the port.
Use these variables for reporting instead of doing
getpeername(0, ...), which doesn't work on Windows.
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>