HTTP: Don't force cookie values to be urlencoded because it breaks us…

…age of cookies in some scenarios like the LiveJournal Importer. Instead add a filter for a plugin to use if it really wants to have the cookie mangled. Fixes #19922 props pw201, dllh and kurtpayne.

git-svn-id: http://svn.automattic.com/wordpress/trunk@20372 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-http.php

@@ -1540,7 +1540,7 @@ function getHeaderValue() {
 		if ( empty( $this->name ) || empty( $this->value ) )
 			return '';
 
-		return $this->name . '=' . urlencode( $this->value );
+		return $this->name . '=' . apply_filters( 'wp_http_cookie_value', $this->value, $this-name );
 	}
 
 	/**