jottacloud: support whitelabel service Phonero Sky

Phonero is a Norwegian mobile provider focusing on the enterprise
market. They provide rebranded Jottacloud service through their «Phonero
Sky» (Norwegian for «Phonero Cloud»).

The Client ID `desktop` used by most of the other whitelabel services
does not work for Phonero Sky. Both `desktop-win` and `desktop-mac`
work, though. Authentication does not work when the `jotta-default`
scope is present, so drop it. This results in a Client ID and scope
setup that is identical with that of Let's Go Cloud (Germany).

backend/jottacloud/jottacloud.go

@@ -91,6 +91,7 @@ func getServices() []service {
 		{"letsgo", "Let's Go Cloud (Germany)", "letsgo.jotta.cloud", "letsgo", "desktop-win", []string{"openid", "offline_access"}},
 		{"mediamarkt", "MediaMarkt Cloud (Multiregional)", "mediamarkt.jottacloud.com", "mediamarkt", "desktop", []string{"openid", "jotta-default", "offline_access"}},
 		{"onlime", "Onlime (Denmark)", "cloud-auth.onlime.dk", "onlime_wl", "desktop", []string{"openid", "jotta-default", "offline_access"}},
+		{"phonero", "Phonero Sky", "sky.phonero.no", "phonero", "desktop-win", []string{"openid", "offline_access"}},
 		{"tele2", "Tele2 Cloud (Sweden)", "mittcloud-auth.tele2.se", "comhem", "desktop", []string{"openid", "jotta-default", "offline_access"}},
 		{"telia_no", "Telia Sky (Norway)", "sky-auth.telia.no", "get", "desktop", []string{"openid", "jotta-default", "offline_access"}},
 		{"telia_se", "Telia Cloud (Sweden)", "cloud-auth.telia.se", "telia_se", "desktop", []string{"openid", "jotta-default", "offline_access"}},

docs/content/jottacloud.md

@@ -30,6 +30,8 @@ as described [below](#traditional):
 - MediaMarkt
   - MediaMarkt Cloud (mediamarkt.jottacloud.com)
   - Let's Go Cloud (letsgo.jotta.cloud)
+- Phonero
+  - Phonero Sky (sky.phonero.no)
 
 Paths are specified as `remote:path`