PHP5-port - uniqid()

[hakre]

​uniqid() does not need a prefix (any longer).

Places in use can be checked if they need to have it passed or not.

Related: #16753

[dd32]

The only locations within core (and not within a external library) where we're using uniqid() are the following:

wp-includes/functions.php
1477:		return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp');
1479:		return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );

wp-includes/pluggable.php
1527:		$rnd_value = md5( uniqid(microtime() . mt_rand(), true ) . $seed );

In neither of these uses is using $prefix exactly bad, or causes any issues.

Closing, as there's no need to update this code, it works, and it's not buggy.