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/103-sys_nerr.patch

@@ -0,0 +1,12 @@
+--- a/src/os/unix/ngx_errno.c
++++ b/src/os/unix/ngx_errno.c
+@@ -8,6 +8,9 @@
+ #include <ngx_config.h>
+ #include <ngx_core.h>
+ 
++#ifndef NGX_SYS_NERR
++#define NGX_SYS_NERR  128
++#endif
+ 
+ /*
+  * The strerror() messages are copied because: