Change history of struct::graphop

Rev	Date	Modified by	Minor edit	Spam	WikiText	Revert to
4	2019-07-08 23:27:00	chrstphrchvz	yes	no	4	4
3	2015-08-12 16:23:13	kap	no	no	3	3
2	2015-08-12 13:38:39	dkf	no	no	2	2
1	2009-02-02 19:55:00	AK	no	no	1	1
0	2009-02-02 19:51:31	AK	no	no	0	0