Add NGINX Secure Link

Hello.

Could you add the Secure Link module to your install.sh?

```
--with-ipv6 \
--with-pcre=$CUDIR/packages/pcre-$pcreVERSION \
--with-http_realip_module  \
--with-http_mp4_module \
--with-http_flv_module  \
--with-http_secure_link_module \
--with-http_stub_status_module &&  make  && make install
```