This follows the [recommendations from upstream](https://discourse.gnome.org/t/please-build-against-libsoup-3-by-default/10190/3). Note that this changes the option name from `soup3` to `soup2`.
Testing Done:
Compiled against libsoup3 and libsoup2.
Reviewed at https://reviews.imfreedom.org/r/2028/
# SOME DESCRIPTIVE TITLE.
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
# This file is distributed under the same license as the PACKAGE package.
#
# Translators:
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"Project-Id-Version: Pidgin\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2022-10-26 01:46-0500\n"
"PO-Revision-Date: 2017-09-19 19:20+0000\n"
"Last-Translator: Richard Laager <rlaager@wiktel.com>\n"