Experimental MySQL-related extensions

Hi,

we (MySQL Connectors Team at Oracle, well mostly Andrey in fact) have
created a few experimental extensions, hooking into mysqlnd to extend
the functionality in a more or less transparent way.

A list of these includes

* mysqlnd_sip - A plugin trying to detect SQL injections by learning
  about valid queries and then validate against the known format
* mysqlnd_mc  - A plugin splitting single queries over multiple
  connections (distribution of workload over multiple servers;
  query-splitting / multi-read)
* mysqlnd_ms  - A plugin for doing master/slave read/write splitting
* possibly others might be coming, too.

These plugins were created to validate our APIs wich we are also using
for things like the query cache plugin we recently added to PECL. These
plugins are in a prototype state. Now we'd like to make them available
to the community. As Oracle currently does not plan to actively support
them it feels wrong to put them into PECL's "Database" category where
they might hide other extension which receive more active support and
development.

While discussing this via IRC it was suggested to create an
"Experimental" top-level category on pecl.php.net and put them there. To
me this looks like a good proposal. From there they can easily be picked
up, be extended, provide ideas for other modules, ...

If nobody objects I'd create that category and we'd commit them to
pecl/mysqlnd_mc, pecl/mysqlnd_sip, ... in svn and register the
extensions on the website.

Johannes
-- 
Johannes Schlüter
MySQL Engineering Connectors and Client Connectivity

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