SYNC_FOLDER_TYPE_UNKNOWN to the list of contact types, added
Utils::ChangeFolderToTypeUnknownForKoe() and
Utils::IsFolderToBeProcessedByKoe(), exporting
SYNC_FOLDER_TYPE_USER_CONTACT as SYNC_FOLDER_TYPE_UNKNOWN when
synchronizing to OL+KOE, accepting folder update when KOE is done
patching the folder, patch additional folders when type is still
SYNC_FOLDER_TYPE_UNKNOWN, prevent Sync & Ping for not yet patched
folders.

Released under the Affero GNU General Public License (AGPL) version 3.