Gunzip filter import.
diff --git a/auto/modules b/auto/modules
index 2d9da94..0992391 100644
--- a/auto/modules
+++ b/auto/modules
@@ -109,6 +109,7 @@
 #         ngx_http_image_filter
 #         ngx_http_sub_filter
 #         ngx_http_addition_filter
+#         ngx_http_gunzip_filter
 #         ngx_http_userid_filter
 #         ngx_http_headers_filter
 #     ngx_http_copy_filter
@@ -166,6 +167,13 @@
     HTTP_SRCS="$HTTP_SRCS $HTTP_ADDITION_SRCS"
 fi
 
+if [ $HTTP_GUNZIP = YES ]; then
+    have=NGX_HTTP_GZIP . auto/have
+    USE_ZLIB=YES
+    HTTP_FILTER_MODULES="$HTTP_FILTER_MODULES $HTTP_GUNZIP_FILTER_MODULE"
+    HTTP_SRCS="$HTTP_SRCS $HTTP_GUNZIP_SRCS"
+fi
+
 if [ $HTTP_USERID = YES ]; then
     HTTP_FILTER_MODULES="$HTTP_FILTER_MODULES $HTTP_USERID_FILTER_MODULE"
     HTTP_SRCS="$HTTP_SRCS $HTTP_USERID_SRCS"
diff --git a/auto/options b/auto/options
index 11f23c6..191d6c8 100644
--- a/auto/options
+++ b/auto/options
@@ -94,6 +94,7 @@
 HTTP_DEGRADATION=NO
 HTTP_FLV=NO
 HTTP_MP4=NO
+HTTP_GUNZIP=NO
 HTTP_GZIP_STATIC=NO
 HTTP_UPSTREAM_IP_HASH=YES
 HTTP_UPSTREAM_LEAST_CONN=YES
@@ -210,6 +211,7 @@
         --with-http_dav_module)          HTTP_DAV=YES               ;;
         --with-http_flv_module)          HTTP_FLV=YES               ;;
         --with-http_mp4_module)          HTTP_MP4=YES               ;;
+        --with-http_gunzip_module)       HTTP_GUNZIP=YES            ;;
         --with-http_gzip_static_module)  HTTP_GZIP_STATIC=YES       ;;
         --with-http_random_index_module) HTTP_RANDOM_INDEX=YES      ;;
         --with-http_secure_link_module)  HTTP_SECURE_LINK=YES       ;;
@@ -356,6 +358,7 @@
   --with-http_dav_module             enable ngx_http_dav_module
   --with-http_flv_module             enable ngx_http_flv_module
   --with-http_mp4_module             enable ngx_http_mp4_module
+  --with-http_gunzip_module          enable ngx_http_gunzip_module
   --with-http_gzip_static_module     enable ngx_http_gzip_static_module
   --with-http_random_index_module    enable ngx_http_random_index_module
   --with-http_secure_link_module     enable ngx_http_secure_link_module
diff --git a/auto/sources b/auto/sources
index 522d722..37677c7 100644
--- a/auto/sources
+++ b/auto/sources
@@ -331,6 +331,10 @@
 HTTP_GZIP_SRCS=src/http/modules/ngx_http_gzip_filter_module.c
 
 
+HTTP_GUNZIP_FILTER_MODULE=ngx_http_gunzip_filter_module
+HTTP_GUNZIP_SRCS=src/http/modules/ngx_http_gunzip_filter_module.c
+
+
 HTTP_SSI_FILTER_MODULE=ngx_http_ssi_filter_module
 HTTP_SSI_DEPS=src/http/modules/ngx_http_ssi_filter_module.h
 HTTP_SSI_SRCS=src/http/modules/ngx_http_ssi_filter_module.c