Core: fixed ngx_write_chain_to_file() with IOV_MAX reached. Catched by dav_chunked.t on Solaris. In released versions this might potentially result in corruption of complex protocol responses if they were written to disk and there were more distinct buffers than IOV_MAX in a single write.

--- a/src/os/unix/ngx_files.c
+++ b/src/os/unix/ngx_files.c
@@ -246,6 +246,7 @@ ngx_write_chain_to_file(ngx_file_t *file
 
         file->sys_offset += n;
         file->offset += n;
+        offset += n;
         total += n;
 
     } while (cl);