Switch from serialize to json_encode for SiteOptions

Note that this requires a minor database migration of SiteOptions in
users_info and Paranoia in users_main

sections/user/edit.php

   error(403);
 }
 
-$Paranoia = unserialize($Paranoia);
+$Paranoia = json_decode($Paranoia, true);
 if (!is_array($Paranoia)) {
   $Paranoia = array();
 }
 }
 
 if ($SiteOptions) {
-  $SiteOptions = unserialize($SiteOptions);
+  $SiteOptions = json_decode($SiteOptions, true);
 } else {
   $SiteOptions = array();
 }
 View::show_header("$Username > Settings", 'user,password_validate,validate,cssgallery,preview_paranoia,bbcode,user_settings,donor_titles');
 
 
-var_dump($SiteOptions);
 
 $DonorRank = Donations::get_rank($UserID);
 $DonorIsVisible = Donations::is_visible($UserID);

sections/user/take_edit.php

     i.StyleID = '".db_string($_POST['stylesheet'])."',
     i.StyleURL = '".db_string($_POST['styleurl'])."',
     i.Avatar = '".db_string($_POST['avatar'])."',
-    i.SiteOptions = '".db_string(serialize($Options))."',
+    i.SiteOptions = '".db_string(json_encode($Options))."',
     i.NotifyOnQuote = '".db_string($Options['NotifyOnQuote'])."',
     i.Info = '".db_string($_POST['info'])."',
     i.InfoTitle = '".db_string($_POST['profile_title'])."',
     i.UnseededAlerts = '$UnseededAlerts',
     m.Email = '".DBCrypt::encrypt($_POST['email'])."',
     m.IRCKey = '".db_string($_POST['irckey'])."',
-    m.Paranoia = '".db_string(serialize($Paranoia))."'";
+    m.Paranoia = '".db_string(json_encode($Paranoia))."'";
 
 if ($ResetPassword) {
   $ChangerIP = db_string(DBCrypt::encrypt($LoggedUser['IP']));