[patch] safe_mode_include_dir

Hello ... It's been a while since I've actively been committing to PHP. So I thought I'd run this by everyone first. This is a patch to change the behavior of the PHP.INI directive "safe_mode_include_dir" (which I added about 6 months ago). As it is currently, "safe_mode_include_dir" takes a single directory (ie. /usr/local/lib/php) and bypasses UID/GID checks on files included from that directory. This patch changes the behavior to allow a path-style list of directories to be listed (similar to "include_path"). While I was at it, I made the code surrounding the check much more readable by separating the safe_mode_include_dir check into a separate function (a la open_base_dir_check). Since a single directory is a valid path-style string, this patch is completely backward compatible. Unless I broke anything in the actual checking, which is another reason I am posting this before I commit it. I cannot get current CVS to build, so this patch is off of php-4.1.1, but applies cleanly to php-cvs. Thanks, -James