Update nginx-unstable to 1.3.15.

Add IPv6 support to smtp auth in nginx.

component/nginx/buildout.cfg

@@ -11,20 +11,15 @@ md5sum = d252f5c689a14a668e241c744ccf5f06
 configure-options=
   --with-ipv6
   --with-http_ssl_module
+  --with-mail
+  --with-mail_ssl_module
   --with-ld-opt="-L ${zlib:location}/lib -L ${openssl:location}/lib -L ${pcre:location}/lib  -Wl,-rpath=${pcre:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${openssl:location}/lib"
   --with-cc-opt="-I ${pcre:location}/include -I ${openssl:location}/include -I ${zlib:location}/include"
 
 [nginx-unstable]
-recipe = hexagonit.recipe.cmmi
-url = http://nginx.org/download/nginx-1.3.14.tar.gz
-md5sum = 9b13753c88ea682fddd1495cb36e5d39
-configure-options=
-  --with-ipv6
-  --with-http_ssl_module
-  --with-ld-opt="-L ${zlib:location}/lib -L ${openssl:location}/lib -L ${pcre:location}/lib  -Wl,-rpath=${pcre:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${openssl:location}/lib"
-  --with-cc-opt="-I ${pcre:location}/include -I ${openssl:location}/include -I ${zlib:location}/include"
-
-
+<= nginx
+url = http://nginx.org/download/nginx-1.3.15.tar.gz
+md5sum = ded252047393c79a31b0862e9166a065
 
 [hexaglobe-nginx-module]
 recipe = hexagonit.recipe.download