Allow all users to create and link people tags.

models/Tag.php

@@ -226,6 +226,9 @@ class Tag
 		if (!isset($data['id_parent']))
 			$data['id_parent'] = 0;
 
+		if (!isset($data['description']))
+			$data['description'] = 0;
+
 		if (!isset($data['count']))
 			$data['count'] = 0;
 
@@ -297,6 +300,23 @@ class Tag
 			['tokens' => '%' . strtolower(implode('%', $tokens)) . '%']);
 	}
 
+	public static function matchPeople($tokens)
+	{
+		if (!is_array($tokens))
+			$tokens = explode(' ', $tokens);
+
+		return Registry::get('db')->queryPair('
+			SELECT id_tag, tag
+			FROM tags
+			WHERE LOWER(tag) LIKE {string:tokens} AND
+				kind = {string:person}
+			ORDER BY tag ASC',
+			[
+				'tokens' => '%' . strtolower(implode('%', $tokens)) . '%',
+				'person' => 'Person',
+			]);
+	}
+
 	public static function exactMatch($tag)
 	{
 		if (!is_string($tag))