Merge the following from the English version:
1.85 -> 1.92 handbook/x11/chapter.sgml
Submitted by: Hiroo Ono <hiroo _at_ jp dot FreeBSD dot org>
Reviewed by: Ryusuke Suzuki <ryusuke _at_ jp dot FreeBSD dot org>
References: [doc-jp-work 1151, 1276, 1277, 1391]