Remove safe mode references

safe_mode was deprecated in PHP 5.3 and removed in 5.4. This removes
remaining references to it in the code.

Fixes #934

adodb.inc.php

@@ -391,10 +391,7 @@ function flushcache($f, $debug=false) {
 		 */
 		function getdirname($hash) {
 			global $ADODB_CACHE_DIR;
-			if (!isset($this->notSafeMode)) {
-				$this->notSafeMode = !ini_get('safe_mode');
-			}
-			return ($this->notSafeMode) ? $ADODB_CACHE_DIR.'/'.substr($hash,0,2) : $ADODB_CACHE_DIR;
+			return $ADODB_CACHE_DIR . '/' . substr($hash, 0, 2);
 		}
 
 		/**
@@ -409,7 +406,7 @@ function createdir($hash, $debug) {
 			global $ADODB_CACHE_PERMS;
 
 			$dir = $this->getdirname($hash);
-			if ($this->notSafeMode && !file_exists($dir)) {
+			if (!file_exists($dir)) {
 				$oldu = umask(0);
 				if (!@mkdir($dir, empty($ADODB_CACHE_PERMS) ? 0771 : $ADODB_CACHE_PERMS)) {
 					if(!is_dir($dir) && $debug) {
@@ -2472,7 +2469,7 @@ function CacheFlush($sql=false,$inputarr=false) {
 	 *  - userid
 	 *  - setFetchMode (adodb 4.23)
 	 *
-	 * When not in safe mode, we create 256 sub-directories in the cache directory ($ADODB_CACHE_DIR).
+	 * We create 256 sub-directories in the cache directory ($ADODB_CACHE_DIR).
 	 * Assuming that we can have 50,000 files per directory with good performance,
 	 * then we can scale to 12.8 million unique cached recordsets. Wow!
 	 */

tests/test.php

@@ -1719,7 +1719,7 @@ function adodb_test_err($dbms, $fn, $errno, $errmsg, $p1=false, $p2=false)
 
 	CheckWS('firebird');
 	CheckWS('sybase');
-	if (!ini_get('safe_mode')) CheckWS('informix');
+	CheckWS('informix');
 
 	CheckWS('ado_mssql');
 	CheckWS('ado_access');