Changes with nginx 1.0.10 15 Nov 2011

*) Bugfix: a segmentation fault might occur in a worker process if
resolver got a big DNS response.
Thanks to Ben Hawkes.

*) Bugfix: in cache key calculation if internal MD5 implementation was
used; the bug had appeared in 1.0.4.

*) Bugfix: the module ngx_http_mp4_module sent incorrect
"Content-Length" response header line if the "start" argument was
used.
Thanks to Piotr Sikora.