upmpdcli.service needs to start after mpd.service and other suggestions

Description:

On boot there can be a race condition between mpd and upmpdcli causing upmpdcli to not find mpd and fail after boot.

Additional info:

• package version(s): 1.8.8-1
• config and/or log files: upmpdcli.service
• link to upstream bug report, if any:

Steps to reproduce:

1. It's very hard to be repeatable, but just reboot until upmpdcli fails. Perhaps just don't enable mpd.service to spot the isuse.

Suggested fix: Add After= and Wants= lines below to the upmpdcli.service

[Unit]
Description=UPnP Renderer front-end to MPD
After=network-online.target mpd.service
Wants=network-online.target

Also if upmpdcli is configured to use alsa, it would be good to have upmpdcli a member of the audio group.

I noted a few other minor issues below.