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:
# abuyop <abuyop@gmail.com>, 2015-2017
# Muhammad Najmi bin Ahmad Zabidi <najmi.zabidi@gmail.com>, 2011