External Libraries: Replace `split()` with `explode()` in the deprecated Atom and MagpieRSS files.

Before PHP7 `split()` was throwing a deprecated notice, in PHP7 the function is completely removed and throws a fatal error.

Props achbed.
Fixes #20673.
Built from https://develop.svn.wordpress.org/trunk@37402


git-svn-id: http://core.svn.wordpress.org/trunk@37368 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/atomlib.php

@@ -313,7 +313,7 @@ class AtomParser {
 
     function ns_to_prefix($qname, $attr=false) {
         # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div')
-        $components = split(":", $qname);
+        $components = explode(":", $qname);
 
         # grab the last one (e.g 'div')
         $name = array_pop($components);

wp-includes/rss.php

@@ -114,7 +114,7 @@ class MagpieRSS {
 		// check for a namespace, and split if found
 		$ns	= false;
 		if ( strpos( $element, ':' ) ) {
-			list($ns, $el) = split( ':', $element, 2);
+			list($ns, $el) = explode( ':', $element, 2);
 		}
 		if ( $ns and $ns != 'rdf' ) {
 			$this->current_namespace = $ns;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-alpha-37383';
+$wp_version = '4.6-alpha-37402';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.