Explicitly signal HE-AAC in DASH manifest

This works around an issue in the Chromium MediaSource implementation[1].
Chromium will not play a video when the audio track uses HE-AAC, unless it is
explicitly signaled in the manifest.

[1]: https://code.google.com/p/chromium/issues/detail?id=370927#c3
Merge pull request #458 from saintdev/for-upstream

Explicitly signal HE-AAC in DASH manifest
Merge branch 'master' of github.com:arut/nginx-rtmp-module
Update ngx_rtmp_mpegts.c

Fixes for "warning C4244: '=' : conversion from 'uint64_t' to 'u_char', possible loss of data"
fixed compilation
Merge pull request #469 from itpp16/patch-1

Update ngx_rtmp_mpegts.c
added queue init
enabled static relay cleanup to fix static_relay+auto_push combination
implement configurable file and directory create mode for hls/dash