nginx: import from packages, add myself as the maintainer

This adds the nginx package from the old svn package fee. I adopt
the licensing information and will maintain the package in the future.
This request also updates nginx to the last stable version 1.4.7. It further
adds support for
 - naxsi (the ngix web application firewall)
 - syslog module
 - http upstream check module
 - support for the haproxy Proxy Protocol (this way nginx can see the real
   ip address behind haproxy)
Building was tested with target x86_64, ar71xx and avr32.

Signed-off-by: Thomas Heil <heil@terminal-consulting.de>

net/nginx/patches/200-config.patch

@@ -0,0 +1,18 @@
+--- a/conf/nginx.conf
++++ b/conf/nginx.conf
+@@ -1,5 +1,5 @@
+ 
+-#user  nobody;
++user nobody nogroup;
+ worker_processes  1;
+ 
+ #error_log  logs/error.log;
+@@ -16,7 +16,7 @@ events {
+ 
+ http {
+     include       mime.types;
+-    default_type  application/octet-stream;
++    #default_type  application/octet-stream;
+ 
+     #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+     #                  '$status $body_bytes_sent "$http_referer" '