As per XDG Base Directories specification:
> If $XDG_RUNTIME_DIR is not set applications should fall back
> to a replacement directory [...]
In practice, the ownCloud client has the fallback, but the plugin
helper does not, and if $XDG_RUNTIME_DIR is not set, the plugin
mysteriously does not work.
This partially reverts commit 1c721e9422.
This caused the overlay plugin to be installed at the wrong place
because the kcoreaddons_add_plugin macto still use deprecated
${PLUGIN_INSTALL_DIR}.
I guess we'll have to live with the warnings.
* SocketAPI has COPL_LOCAL_LINK / EMAIL_LOCAL_LINK commands
* The nautilus and dolphing shell integrations show a submenu from which
one can share as well as access the private link.
* The SocketAPI provides a new GET_STRINGS command to access localized
strings.
* The private link can also be accessed from the user/group sharing
dialog.
* The numeric file id is extracted from the full id to create the
private link url.
OEM configurability creates binaries with OEM names which the .desktop
file doesn't take into account and thus dolphin integration does not
work if OEM changes the binary's name(s).
These changes are now integrated into the .desktop file at compile time.
