suphp.conf overwritten when running ./build rewrite_confs

1. create dir /usr/local/suphp/etc/custom/
2. copy /usr/local/suphp/etc/suphp.conf to /usr/local/suphp/etc/custom/suphp.conf
3. Copy suphp configure script from custombuild/configure/suphp/ to custombuild/custom/suphp/
4. update path for config file to /usr/local/suphp/etc/custom/suphp.conf
5. re-install suphp