Testing Done:
Deleted the old `blist.xml` from my `XDG_CONFIG_HOME` and verified that I only got the new contacts and verified that they were not stored back to `blist.xml`.
Reviewed at https://reviews.imfreedom.org/r/2432/
<?xml version="1.0" encoding="UTF-8"?>
<!--
Pidgin - Internet Messenger
Copyright (C) Pidgin Developers <devel@pidgin.im>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this library; if not, see <https://www.gnu.org/licenses/>.