removed some legacy escaping code from _backup() in the MySQL utility, fixing bug 4536

http://codeigniter.com/bug_tracker/bug/4536/
diff --git a/system/database/drivers/mysql/mysql_utility.php b/system/database/drivers/mysql/mysql_utility.php
index 6fb1ab4..e035e0c 100644
--- a/system/database/drivers/mysql/mysql_utility.php
+++ b/system/database/drivers/mysql/mysql_utility.php
@@ -176,15 +176,6 @@
 					}

 					else

 					{

-						// Do a little formatting...

-						$v = str_replace(array("\x00", "\x0a", "\x0d", "\x1a"), array('\0', '\n', '\r', '\Z'), $v);

-						$v = str_replace(array("\n", "\r", "\t"), array('\n', '\r', '\t'), $v);

-						$v = str_replace('\\', '\\\\',	$v);

-						$v = str_replace('\'', '\\\'',	$v);

-						$v = str_replace('\\\n', '\n',	$v);

-						$v = str_replace('\\\r', '\r',	$v);

-						$v = str_replace('\\\t', '\t',	$v);

-

 						// Escape the data if it's not an integer

 						if ($is_int[$i] == FALSE)

 						{

diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index a1afab1..7a0a251 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -112,6 +112,7 @@
 	<li>Modified XSS sanitization to no longer add semicolons after &amp;[single letter], such as in M&amp;M's, B&amp;B, etc.</li>

 	<li>Modified XSS sanitization to no longer strip XHTML image tags of closing slashes.</li>

 	<li>Fixed a bug in the Session class when database sessions are used where upon session update all userdata would be errantly written to the session cookie.</li>

+	<li>Fixed a bug (#4536) in backups with the MySQL driver where some legacy code was causing certain characters to be double escaped.</li>

 </ul>

 

 <h2>Version 1.6.3</h2>