files/configure.php just passes a naked --with-xslt-sablot to PHP
./configure; most other libraries are passed LOCALBASE, either
absolutely or conditionally (like in the case of bzip2).
Since PHP's lovely 75,000 line ./configure only checks /usr and
/usr/local by default, anyone who's dumb enough to change LOCALBASE
(read: me) will have configure fail.
Fix: This worked for me, tested with www/mod_php4 and lang/php4
Anyone who installed Sablotron outside ports and elsewhere than LOCALBASE
will hate it, but this is what configure.php appears to do for most other
over to maintainer