Fixed PHP-1058: Enable Cyrus-SASL on Windows

- Pass streams and sasl as flags
- Remove config-w32.h
- Fixed config.w32 syntax
Add extension dependency on json and openssl

Mark them as required on windows, since they are always available
using the official PHP binaries.
Merge pull request #677 from bjori/PHP-1058-cyrus-on-windows

PHP-1058: Windows build issues (enable Cyrus, json/openssl dependencies)

* bjori/PHP-1058-cyrus-on-windows:
  Add extension dependency on json and openssl
  Fixed PHP-1058: Enable Cyrus-SASL on Windows