Patches before this are likely be packported to v4-19-test and v4-19-stable

We need these from between 4.19.3 and 4.19.4:

git format-patch --stdout -29 50f74d0488438e722eaeb492ae40f07432eb4530

git log --oneline --no-decorate -29 50f74d048843
50f74d048843 s3:smbd multichannel: always refresh the network information
8c63b219a268 s3:ctdbd_conn: fix ctdbd_public_ip_foreach() for ipv6 addresses
efc1a606a271 VERSION: move COPYRIGHT_STARTUP_MESSAGE as SAMBA_COPYRIGHT_STRING into version.h
2298b92f1832 lib/util: convert DBG_STARTUP_NOTICE() to use debug_set_forced_log_priority(DBGLVL_NOTICE)
98d794260222 lib/util: add debug_set_forced_log_priority()
928dfe6e94d7 source3/nmbd/nmbd.c: use DBG_STARTUP_NOTICE
ed2806fd166e lib/util/become_daemon.c: use DBG_STARTUP_NOTICE
51ce833dd52f logging: use DBG_STARTUP_NOTICE for startup message
fb08893cde41 debug.h: introduce DEBUG_STARTUP_NOTICE
13748870c379 lib/util: move copyright define to copyright.h
c05330a909f1 s4/server.c: move some log messages from ERR to NOTICE
8b913da8b990 profile: issues info message with lower log level
3d3cc1bd68f5 s3:rpc_server: call reopen_logs before we print the copyright notice
853efb9dd7b7 ctdb-server: Drop unnecessary copy of destination address
2e93e358ef9f ctdb-daemon: Use ctdb_connection_to_buf() to simplify
2640bae75e3a smbd: Remove callback for release_ip when "state" is free'ed
43b7068676a0 s3:selftest: add samba3.blackbox.smbXsrv_client_ctdb_registered_ips
d96cb627b66d selftest: export/use CTDB related envvars in order to run the ctdb command
8add947b2127 ctdbd_conn: add ctdbd_passed_ips()
e3a4feda112a ctdbd_conn: add ctdbd_unregister_ips()
acf080817b53 ctdbd_conn: Add deregister_from_ctdbd()
d039fa07f7ee ctdbd_conn: let register_with_ctdbd() call CTDB_CONTROL_REGISTER_SRVID just once
e09f92422ebf ctdbd_conn: don't use uninitialized memory in ctdbd_register_ips()
118d6c81ec9f ctdb: add/implement CTDB_CONTROL_TCP_CLIENT_PASSED
b6906f37c667 ctdb: add/implement CTDB_CONTROL_TCP_CLIENT_DISCONNECTED
24bd10ebfc12 ctdb: add ctdb_connection_same() helper
0d6a38604b24 ctdb: make use of ctdb_canonicalize_ip_inplace() in ctdb_control_tcp_client()
69c4f498c84f ctdb: add ctdb_canonicalize_ip_inplace() helper
38134f374ca5 ctdb: remove unused ctdb->client_ip_list and print debug on ctdb_tcp_list instead