Merge the following from the English version:
1.60 -> 1.103 www/ja/where.sgml
Submitted by: Hiroo Ono <hiroo _at_ jp dot FreeBSD dot org>,
Hiroki Kobayashi <solidsneak _at_ hyper dot cx>, ryusuke
Reviewed by: Hiroo Ono <hiroo _at_ jp dot FreeBSD dot org>, ryusuke
References: [doc-jp-work 1402, 1453, 1511, 2019, 2021]
Approved by: hrs (mentor)