comment text=auto.

Signed-off-by: Jack <jack.wgm@gmail.com>
fix comment for multi_download

Signed-off-by: Jack <jack.wgm@gmail.com>
Merge branch 'master' of github.com:avplayer/avhttp
add wait_for_complete() for multi_download

Signed-off-by: Jack <jack.wgm@gmail.com>