pidgin/ljfisher-ssl-client-auth

Add Maiku's revision 0b03678b3dcb1a2fdba5e72a8c7646829d8ab482 to the changelog.
I don't think this change made it into 2.9.0, did it?
#define CUSTOM_USER_DIRECTORY "/dev/null"
#define CUSTOM_PLUGIN_PATH ""
#define PLUGIN_SAVE_PREF "/purple/nullclient/plugins/saved"
#define UI_ID "nullclient"