Add .gitignore and .ratignore files for various directories

guacamole-docker/environment/REMOTE_IP_VALVE_/configure.sh

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+#
+# 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.
+#
+
+##
+## @fn REMOTE_IP_VALVE_/configure.sh
+##
+## Configures Tomcat to forward the IP addresses of clients behind a proxy if
+## the REMOTE_IP_VALVE_ENABLED environment variable is set to "true".
+##
+
+##
+## Array of all xmlstarlet command-line options necessary to add the
+## RemoteIpValve attributes that correspond to various "REMOTE_IP_VALVE_*"
+## environment variables.
+##
+declare -a VALVE_ATTRIBUTES=( --insert '/Server/Service/Engine/Host/Valve[not(@className)]' --type attr -n className -v org.apache.catalina.valves.RemoteIpValve )
+
+# Translate all properties supported by RemoteIpValve into corresponding
+# environment variables
+for ATTRIBUTE in \
+    remoteIpHeader \
+    internalProxies \
+    proxiesHeader \
+    trustedProxies \
+    protocolHeader \
+    protocolHeaderHttpsValue \
+    httpServerPort \
+    httpsServerPort; do
+
+    VAR_NAME="REMOTE_IP_VALVE_$(echo "$ATTRIBUTE" | sed 's/\([a-z]\)\([A-Z]\)/\1_\2/g' | tr 'a-z' 'A-Z')"
+    if [ -n "${!VAR_NAME}" ]; then
+        VALVE_ATTRIBUTES+=( --insert '/Server/Service/Engine/Host/Valve[@className="org.apache.catalina.valves.RemoteIpValve"]' --type attr -n "$ATTRIBUTE" -v "${!VAR_NAME}" )
+    else
+        echo "Using default RemoteIpValve value for \"$ATTRIBUTE\" attribute."
+    fi
+
+done
+
+# Programmatically add requested RemoteIpValve entry
+xmlstarlet edit --inplace \
+    --insert '/Server/Service/Engine/Host/*' --type elem -n Valve \
+    "${VALVE_ATTRIBUTES[@]}" \
+    "$CATALINA_BASE/conf/server.xml"
+