- Changed dl() to be disabled by default. Enabled only when explicitly
registered by the SAPI layer. Enabled only with CLI, CGI and EMBED. (Dmitry)
-- Changed opendir/dir/scandir to use default context
- when no context argument is passed. (Sara)
- Changed open_basedir to allow tightening in runtime contexts. (Sara)
- Changed allow_url_fopen/allow_url_include to allow
per-wrapper enable/disable and runtime tightening. (Sara)