Merge branch 'master' into 1_5_0

diff --cc configure.ac
Simple merge

diff --cc src/lib/yang/Makefile.am
index bf5717e350b313db6c8af9894eb97d5465ff1f46,25c025acc69ffc0cf848631be2bfc46a5c643969..8e91149d927f74fd28ca0f0a43ed43a04b9eba60
--- 1/src/lib/yang/Makefile.am
--- 2/src/lib/yang/Makefile.am
+++ b/src/lib/yang/Makefile.am
@@@ -64,23 -64,9 +64,24 @@@ libkea_yang_include_HEADERS = 
        translator_pool.h \
        translator_shared_network.h \
        translator_subnet.h \
-       yang_models.h
+       yang_models.h \
+       yang_revisions.h
  
  EXTRA_DIST = yang.dox
 +# Distribute yang modules.
 +EXTRA_DIST += models/ietf-dhcpv6-client.yang
 +EXTRA_DIST += models/ietf-dhcpv6-options.yang
 +EXTRA_DIST += models/ietf-dhcpv6-relay.yang
 +EXTRA_DIST += models/ietf-dhcpv6-server.yang
 +EXTRA_DIST += models/ietf-dhcpv6-types.yang
 +EXTRA_DIST += models/ietf-inet-types.yang
 +EXTRA_DIST += models/ietf-yang-types.yang
 +EXTRA_DIST += models/kea-ctrl-agent.yang
 +EXTRA_DIST += models/kea-dhcp-ddns.yang
 +EXTRA_DIST += models/kea-dhcp-types.yang
 +EXTRA_DIST += models/kea-dhcp4-server.yang
 +EXTRA_DIST += models/kea-dhcp6-server.yang
 +EXTRA_DIST += models/kea-logging.yang
 +EXTRA_DIST += models/kea-types.yang
  
  CLEANFILES = *.gcno *.gcda