git clone https://github.com/openresty/headers-more-nginx-module
git clone https://github.com/sto/ngx_http_auth_pam_module
git clone https://github.com/arut/nginx-dav-ext-module/
git clone https://github.com/openresty/echo-nginx-module
git clone https://github.com/nginx-modules/ngx_cache_purge