Merge the following from the English version:

1.9 -> 1.12 copyright/license.sgml

Submitted by: Hiroki Kobayashi <solidsneak at hyper dot cx>
Reviewed by: Hiroo Ono <hiroo at jp dot FreeBSD dot jp>, ryusuke
References: [doc-jp-work 1418, 1424, 1430, 1440, 1442]