Fix compatibility with nginx-1.3.2+.

Patch from Ruslan Ermilov.

Change-Id: Ib0f668c9950ab2d499997d5fcc26396cdb9854b8
Signed-off-by: Piotr Sikora <[email protected]>

Author: PiotrSikora

config

@@ -1,3 +1,7 @@
+if [ "$HTTP_PROXY" = "YES" ]; then
+    have=NGX_HTTP_PROXY . auto/have
+fi
+
 if [ "$HTTP_FASTCGI" = "YES" ]; then
     have=NGX_HTTP_FASTCGI . auto/have
 fi