ref #572

main/php: fixed remaining dependency issues, added php-ctype, php-enchant, php-xmlreader, gdbm support to php-dba

Changelog (php-5.3.6-r2 -> r3)
- removed cyrus-sasl-dev from makedepends; php-ldap *could* use it, but
  there are issues with it finding sasl.h (let me know if you fix it)
- added gdbm support to php-dba
- added php-ctype, php-enchant, and php-xmlreader
- removed --disable-all from ./configure line (it's best to keep
  defaults enabled)
- php extensions now depend on the php package
- fixed remaining inter-extension dependency issues

needed by py-docutils

needs zlib-dev

needed by openjdk6

needed by openjdk6

needed by openjdk6

we default to /usr prefix and move things that busybox has in /bin
to /bin and do same with /usr/sbin

It's just too many packages that uses hardcoded /usr/bin/install