OpenChange 2.2 replaced MAPI_E_NETWORK_ERROR code with ecRpcFailed code,
which required changes on the evolution-mapi side.

The translation should be merged into the appdata related files.

This is useful for GNOME Software, to show the plugin as an addon
for the Evolution. The used translatable strings are taken from
the camel provider.

CamelStore now handles this flag directly; subclasses will never receive
it.

Win32 headers have a #define for 'interface', which breaks the build when
this word is used in the code, thus replace it to 'iface', the same way
as GLib or GTK+ code use to have it.