htsp server: add dead-queue-check (for further analysis)
htsp server: fix missing tcp_connection_land() call, caused memory corruptions
tcp: little improvements in the tcp_connection_launch()
Merge remote-tracking branch 'upstream/master'
htsp server: timeshift must be destroyed before subscription queue flush, fixes #2351
ACL: add full rights copy for tickets to resolve connection counting, fixes #2349
Merge remote-tracking branch 'upstream/master'