[Packaging] Add systemd user services

Files should be installed into /usr/lib/systemd/user/

Unlike the existing service file, this one configures deluge to run as a
desktop session user. The difference between the services files is the
use of multi-user.target in system service which does not exist for user
services so requires default.target.

Including the Slice indicates to the service manager that this is a
background service. This can be used to handle OOM situations, or
prioritising foreground processes. There's no equivalent for system
services.

Refs: https://dev.deluge-torrent.org/ticket/2034
Closes: https://github.com/deluge-torrent/deluge/pull/380

packaging/systemd/deluge-web.service

@@ -1,7 +1,7 @@
 [Unit]
 Description=Deluge Bittorrent Client Web Interface
 Documentation=man:deluge-web
-After=network-online.target deluged.service
+After=deluged.service
 Wants=deluged.service
 
 [Service]

packaging/systemd/user/deluge-web.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Deluge Bittorrent Client Web Interface
+Documentation=man:deluge-web
+After=deluged.service
+Wants=deluged.service
+
+[Service]
+UMask=027
+
+ExecStart=/usr/bin/deluge-web -d
+
+Restart=on-failure
+Slice=background.slice
+
+[Install]
+WantedBy=default.target

packaging/systemd/user/deluged.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Deluge Bittorrent Client Daemon
+Documentation=man:deluged
+
+[Service]
+UMask=007
+ExecStart=/usr/bin/deluged -d
+Restart=on-failure
+TimeoutStopSec=300
+Slice=background.slice
+
+[Install]
+WantedBy=default.target