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
 Priority: optional
 Architecture: amd64
-Depends: ${shlibs:Depends}, ${misc:Depends}
+Depends: ${shlibs:Depends}, ${misc:Depends}, lsb-base (>= 3.0-6)
 Description: high performance web server
  nginx [engine x] is an HTTP and reverse proxy server, as well as
  a mail proxy server.