Update xml/cn/docs/http/ngx_http_log_module.xml
translated ngx_http_gunzip.module.xml
translated ngx_http_split_clients_module.xml
translated ngx_http_gunzip_module.xml
Update xml/cn/docs/http/ngx_http_gunzip_module.xml
Update xml/cn/docs/http/ngx_http_gunzip_module.xml
Update xml/cn/docs/http/ngx_http_gunzip_module.xml
Merge pull request #32 from nigelzeng/master

translate ngx_http_split_clients_module.xml & ngx_http_gunzip.module.xml file.