- add doc.common.mk, which defines variables, targets, and
dependencies commonly used in www/ and doc/.
- move www/<lang>/includes.xsl to the language independent
directory and split into several files.
- add transtable*.xsl and transtable.xml to support localized
mirror names.
- make doc/{en_US.ISO8859-1,ja_JP.eucJP}/books/handbook/ use
mirrors.xml (mirrors and eresources).
- make www/{en,ja}/index.xsl use mirrors.xml.
For details, please see doc/share/sgml/README.mirrors for the moment.
Reviewed by: simon and Alex Dupre <sysadmin@alexdupre.com>
