Update betarel.* macros to 9.2 BETA1.
Some mirrors have already picked up the 9.2-BETA1 images.  Enable the
testing links now, pending the official announcement to follow in a
few hours.
Spelling correction.  Explain that two spaces come between sentences, not
at the beginning or end of a sentence.  Modernize the acronym guidelines.
- Merge the following from the English version:

	r41400 -> r42363	head/ja_JP.eucJP/share/xml/release.l10n.ent
- Merge the following from the English version:

	r42363 -> r42364	head/ja_JP.eucJP/share/xml/release.l10n.ent
Announce 9.2-BETA1.
Remove www.tr.FreeBSD.org (around six months stale), and
ftp2.tr.FreeBSD.org (around 8 months stale).
Fix broken link to the Subversion mirror list.
Rearrange SRCS declarations to match order of chapters.
Add an editor configuration chapter that shows helpful configurations for
specific editors.  Other editor configuration content will be moved to
this chapter.
Clarify the indentation section, replace the Emacs and Vim configuration
mentions with an xref to the new editor config chapter.
Simplify the quick start a bit more by referring to later sections.  Use
~/doc for the working copy to be consistent with later sections.
Whitespace-only fixes.  Translators, please ignore.
Shorten the quick start a little more by factoring out repeated references
to the mailing list, make some corrections in wording and directories.
Whitespace-only fixes.  Translators, please ignore.
- Merge the following from the English version:

	r42290 -> r42373	head/ja_JP.eucJP/share/xml/news.xml
Enable URLs for 9.2-BETA1 powerpc.
Fix a spelling error and simplify the acronym definition paragraph.

Submitted by:	bjk
Whitespace-only fixes.  Translators, please ignore.
More simplification and cleanups, replacement of CDATA sections with
sgmltags.