is UTF-8 really necessary as system's default encoding?

[sebix]

intelmqcbmail enforces UTF-8 as the system's default encoding as it exists otherwise:

intelmq-mailgen/intelmqmail/cb.py

Lines 61 to 65 in 6c1ed50

	if locale.getpreferredencoding() != 'UTF-8':
	log.critical(
	'The preferred encoding of your locale setting is not UTF-8'
	' but %r. Exiting.', locale.getpreferredencoding())
	sys.exit(1)

As the intelmq-mailgen is also used by fody and intelmq-webinput-csv this also requires Apache to run with UTF-8.

All of that regularly causes issues, both on installations and in testing and development environments.

The code was introduced in the very first commit 664c29b and therefore copied from https://github.com/certat/intelmq/blob/a29da5d/intelmq/bin/intelmqcli

I guess it was never checked if this was actually necessary for mailgen. intelmqcli was used on Python 2, so this might just be a leftover from long ago, causing headaches now.