[master] copyright dates, and versions updated for 1.4.0 release

ChangeLog

@@ -1,3 +1,5 @@
+Kea 1.4.0 released on June 15, 2018
+
 1427.	[bug]		marcin
 	Resolved multiple problems causing slow synchronization of
 	leases in the HA hooks library, including adjusting

configure.ac

@@ -7,7 +7,7 @@ AC_PREREQ([2.69])
 # For GIT versions, this is x.y.z-git, where x.y.z denotes the software
 # version that was used as a base + changes that were made later, but
 # are not released yet.
-AC_INIT(kea,1.4.0-beta-git, kea-dev@lists.isc.org)
+AC_INIT(kea,1.4.0-git, kea-dev@lists.isc.org)
 AC_CONFIG_SRCDIR(README)
 
 # serial-tests is not available in automake version before 1.13, so

src/lib/config/command_mgr.h

@@ -1,4 +1,4 @@
-// Copyright (C) 2015-2017 Internet Systems Consortium, Inc. ("ISC")
+// Copyright (C) 2015-2018 Internet Systems Consortium, Inc. ("ISC")
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this

src/lib/config/config_messages.mes

@@ -114,4 +114,4 @@ manager as it happens when the connection is being terminated.
 This error message is issued when the command manager was unable to set
 ready status after scheduling asynchronous send. This is programmatic error
 that should be reported. The command manager may or may not continue
-to operate correctly.
+to operate correctly.

src/lib/http/connection.h

@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")
+// Copyright (C) 2017-2018 Internet Systems Consortium, Inc. ("ISC")
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this