The list contains key-value pairs (of `PurpleKeyValuePair` type now, but
`struct siphdrelement` before) so using `g_ascii_strcasecmp` directly
does not work.
# SOME DESCRIPTIVE TITLE.
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
# This file is distributed under the same license as the PACKAGE package.
#
# Translators:
# INDRANIL DAS GUPTA (ইন্দ্রনীল দাশগুপ্ত) <indradg@l2c2.org>, 2005