Apply TCP timeouts to HTTPS (KKDCP) transport

Apply TCP timeouts to HTTPS (KKDCP) transport

We apply (as of ticket #7604) a ten-second minimum delay after a TCP
connection is accepted before creating new connections or sending UDP
packets.  Apply this timeout to HTTPS connections as well, by removing
the transport check in get_endtime().  As the endtime field is only
set by service_tcp_connect(), it will always have the value 0 for UDP
connection state objects, so there is no need to check the transport
type.

ticket: 8580
target_version: 1.15-next
target_version: 1.14-next
tags: pullup