Merge the following from the English version:
1.187 -> 1.195 docproj/docs.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 1445, 1476, 1515]