Address most Lintian feedback

Need to consider adding a man page to suppress the final warning, but that may not be worth the overhead.

source/debian/control

 Source: nginx
 Maintainer: Erick Hitter <nginx-build@mxh.ethitter.com>
 Build-Depends: debhelper (>= 8.0.0)
-Standards-Version: 3.9.3
+Standards-Version: 4.3.0
 Section: httpd
 
 Package: nginx