- ltmain patch no longer needed
- move the php.ini extension lines to the end of the file
- introduce a new 'phpxs' command which enables/disables
modules from a shell without needing to manually edit php.ini
- libphp4.so now installs into the same module dir as the extensions
- php4-enable is now done by 'phpxs -s' so remove it
tested by wilfried@, feedback from naddy@