deluge: add page (#3101)

pages/common/deluge.md

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+# deluge
+
+> A command line BitTorrent client.
+> More information: <https://deluge-torrent.org>.
+
+- Download a torrent:
+
+`deluge {{url|magnet|path/to/file}}`
+
+- Download a torrent using a specific configuration file:
+
+`deluge -c {{path/to/configuration_file}} {{url|magnet|path/to/file}}`
+
+- Download a torrent and launch the specified user interface:
+
+`deluge -u {{gtk|web|console}} {{url|magnet|path/to/file}}`
+
+- Download a torrent and output the log to a file:
+
+`deluge -l {{path/to/log_file}} {{url|magnet|path/to/file}}`