Update contributing guide

[rbdr/ngx_http_office_hours_filter_module] / config

#
# Copyright 2018 Rubén Beltrán del Río
# 
# Licensed 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.

ngx_addon_name=ngx_http_office_hours_filter_module

if test -n "$ngx_module_link"; then
  ngx_module_type=HTTP
  ngx_module_name=ngx_http_office_hours_filter_module
  ngx_module_srcs="$ngx_addon_dir/ngx_http_office_hours_filter_module.c"

  . auto/module
else
  HTTP_MODULES="$HTTP_MODULES ngx_http_office_hours_filter_module"
  NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_office_hours_filter_module.c"
fi