Update from 1.5.12 to 1.5.13.
*) Change: improved hash table handling; the default values of the
"variables_hash_max_size" and "types_hash_bucket_size" were changed
to 1024 and 64 respectively.
*) Feature: the ngx_http_mp4_module now supports the "end" argument.
*) Feature: byte ranges support in the ngx_http_mp4_module and while
saving responses to cache.
*) Bugfix: alerts "ngx_slab_alloc() failed: no memory" no longer logged
when using shared memory in the "ssl_session_cache" directive and in
*) Bugfix: the "underscores_in_headers" directive did not allow
underscore as a first character of a header.
Thanks to Piotr Sikora.
*) Bugfix: cache manager might hog CPU on exit in nginx/Windows.
*) Bugfix: nginx/Windows terminated abnormally if the
"ssl_session_cache" directive was used with the "shared" parameter.
*) Bugfix: in the ngx_http_spdy_module.