Add Japanese 4.9-RELEASE release docs and connect them to the Web site build:
1.37 -> 1.39 releases/Makefile (new) -> 1.3 releases/4.9R/Makefile (new) -> 1.1 releases/4.9R/docbook.css (new) -> 1.1 releases/4.9R/errata.html (new) -> 1.1 releases/4.9R/hardware.sgml (new) -> 1.1 releases/4.9R/relnotes-alpha.html (new) -> 1.1 releases/4.9R/relnotes-i386.html (new) -> 1.1 releases/4.9R/relnotes.sgml