Add parent_select plugin

plugins/Makefile.am

@@ -66,6 +66,7 @@ include experimental/custom_redirect/Makefile.inc
 include experimental/fq_pacing/Makefile.inc
 include experimental/geoip_acl/Makefile.inc
 include experimental/header_freq/Makefile.inc
+include experimental/parent_select/Makefile.inc
 include experimental/hook-trace/Makefile.inc
 include experimental/icap/Makefile.inc
 include experimental/inliner/Makefile.inc

plugins/experimental/parent_select/Makefile.inc

@@ -0,0 +1,29 @@
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+pkglib_LTLIBRARIES += experimental/parent_select/parent_select.la
+
+experimental_parent_select_parent_select_la_SOURCES = \
+  experimental/parent_select/strategy.cc \
+  experimental/parent_select/healthstatus.cc \
+  experimental/parent_select/consistenthash.cc \
+  experimental/parent_select/consistenthash_config.cc \
+  experimental/parent_select/parent_select.cc
+
+experimental_parent_select_parent_select_la_LDFLAGS = \
+  $(AM_LDFLAGS)
+
+AM_CPPFLAGS += @YAMLCPP_INCLUDES@ $(TS_INCLUDES)