man: document IPv4 subnet for "shared" method

diff --git a/libnm-core/nm-setting-ip-config.c b/libnm-core/nm-setting-ip-config.c
index bbdb19f..d76179c 100644 (file)
--- a/libnm-core/nm-setting-ip-config.c
+++ b/libnm-core/nm-setting-ip-config.c
@@ -2510,6 +2510,9 @@ nm_setting_ip_config_class_init (NMSettingIPConfigClass *setting_class)
         *
         * For methods that imply no upstream network, such as "shared" or
         * "link-local", these properties must be empty.
+        *
+        * For IPv4 method "shared", the IP subnet can be configured by adding one
+        * manual IPv4 address or otherwise 10.42.x.0/24 is chosen.
         **/
        g_object_class_install_property
                (object_class, PROP_METHOD,