Update the minimum supported version

We want to warn if the server version is not supported and did not get
appropriate QA for this client version.

https://github.com/owncloud/enterprise/issues/2687

Author: ogoffart

src/gui/accountsettings.cpp

@@ -651,7 +651,7 @@ void AccountSettings::slotAccountStateChanged()
         if (state == AccountState::Connected) {
             QStringList errors;
             if (account->serverVersionUnsupported()) {
-                errors << tr("The server version %1 is old and unsupported! Proceed at your own risk.").arg(account->serverVersion());
+                errors << tr("The server version %1 is unsupported! Proceed at your own risk.").arg(account->serverVersion());
             }
             showConnectionLabel(tr("Connected to %1.").arg(serverWithUser), errors);
         } else if (state == AccountState::ServiceUnavailable) {

src/gui/owncloudgui.cpp

@@ -196,7 +196,7 @@ void ownCloudGui::slotTrayMessageIfServerUnsupported(Account *account)
     if (account->serverVersionUnsupported()) {
         slotShowTrayMessage(
             tr("Unsupported Server Version"),
-            tr("The server on account %1 runs an old and unsupported version %2. "
+            tr("The server on account %1 runs an unsupported version %2. "
                "Using this client with unsupported server versions is untested and "
                "potentially dangerous. Proceed at your own risk.")
                 .arg(account->displayName(), account->serverVersion()));

src/libsync/account.cpp

@@ -463,7 +463,8 @@ bool Account::serverVersionUnsupported() const
         // not detected yet, assume it is fine.
         return false;
     }
-    return serverVersionInt() < makeServerVersion(9, 1, 0);
+    // Older version which is not "end of life" according to https://github.com/owncloud/core/wiki/Maintenance-and-Release-Schedule
+    return serverVersionInt() < makeServerVersion(10, 0, 0) || serverVersion().endsWith("Nextcloud");
 }
 
 void Account::setServerVersion(const QString &version)

src/libsync/networkjobs.cpp

@@ -423,7 +423,7 @@ void CheckServerJob::onTimedOut()
 
 QString CheckServerJob::version(const QJsonObject &info)
 {
-    return info.value(QLatin1String("version")).toString();
+    return info.value(QLatin1String("version")).toString() + "-" + info.value(QLatin1String("productname")).toString();
 }
 
 QString CheckServerJob::versionString(const QJsonObject &info)