spec: Document versioning of eavesdrop='true'

The wording and formatting used here is consistent with other
semi-recently-added match keys.

Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=101567

diff --git a/doc/dbus-specification.xml b/doc/dbus-specification.xml
index 8ad5833ee26c949d1cf2be198f0846ee317b98fd..64231acde16956d6b9c8a5bbb7269921fdd17899 100644 (file)
--- a/doc/dbus-specification.xml
+++ b/doc/dbus-specification.xml
@@ -4645,6 +4645,13 @@
                       with <literal>eavesdrop='true'</literal> so that they
                       can only be added by privileged connections.
                     </para>
+                    <para>
+                      <emphasis>
+                        This match key was added in version 0.18 of the
+                        D-Bus specification and implemented by the bus
+                        daemon in dbus 1.5.6 and later.
+                      </emphasis>
+                    </para>
                   </entry>
                 </row>
               </tbody>