I'm surprised we haven't done it yet, but we need to rename all the
references to *php5* to *php6* in places like build system and sapi/.
I've done the top-level stuff plus sapi/apache. The patch is attached.
I'll commit soon, if there are no objections. I didn't modify other
sapi/ modules, because I'd rather the maintainers did that. I also left
config.w32 and *.dsp files alone, since I don't want to screw up
Windows users.
-Andrei
