[Solr Wiki] Update of "ReleaseNote40alpha" by RobertMuir

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{{{
MMM??? 2012, Apache Solr™ 4.0-alpha available
The Lucene PMC is pleased to announce the release of Apache Solr 4.0-alpha.

Solr is the popular, blazing fast open source enterprise search platform from 
the Apache Lucene project. Its major features include powerful full-text 
search, hit highlighting, faceted search, dynamic clustering, database 
integration, rich document (e.g., Word, PDF) handling, and geospatial search. 
Solr is highly scalable, providing distributed search and index replication, 
and it powers the search and navigation features of many of the world's 
largest internet sites.

This release contains numerous bug fixes, optimizations, and
improvements, some of which are highlighted below.  The release
is available for immediate download at:
   http://lucene.apache.org/solr/mirrors-solr-latest-redir.html (see note below).

See the CHANGES.txt file included with the release for a full list of
details.

This is an alpha release for early adopters. The guarantee for this alpha release is that the index 
format will be the 4.0 index format, supported through the 5.x series of Apache Lucene, unless there 
is a critical bug (e.g. that would cause index corruption) that would prevent this.

Please report any feedback to the mailing lists (http://lucene.apache.org/core/discussion.html)

Note: The Apache Software Foundation uses an extensive mirroring network for
distributing releases.  It is possible that the mirror you are using may not
have replicated the release yet.  If that is the case, please try another
mirror.  This also goes for Maven access.
}}}