Sun Studio

Those changes are contributed by Sun/MySQL. Two sets of changes
in this patch when Sun Studio is used:
- Explicit inlining of functions
- Prefetch Support

This patch has been tested by Sunny with the plugin statically
built in. Since we've never built the plugin as a dynamically
loaded module on Solaris, it is a separate task to change
plug.in.

rb://142
Approved by: Heikki