Occasional ALSA buffer xruns and file fragments in S3 buckets

[scottveirs]

Noticed a few errors via logDNA while testing arm32v7 branch with lagged m3u8 file. Possible fixes:

To reduce the xruns, add back in to the ffmpeg call this flag: -thread_queue_size 1024

To avoid copying file fragments (from rsync tmp writes, I think) via s3fs to the buckets, add to the relevant rsync calls these flags: --exclude='*.flac.*' and --exclude='*.ts.*'

[mcshicks]

Reassigning to me. I don't see this right now in my latest testing but I haven't looked at it to carefully. I have logdna working again so I will check the orcalab node as well as my own