Eliminate latin1 encoded characters

Characters encoded in latin1 (with no encoding comment) will not
work in R17 since the default encoding will be UTF-8.

The asn1 test suite contains two instances of comments written in
Swedish.

The comment in the .asn1config file is hard to understand and possibly
out-of-date. Since the comment is not essential, simply delete it.

Translate the comment in the other file to English.
Merge branch 'bjorn/asn1/fix-latin1-issue' into maint

* bjorn/asn1/fix-latin1-issue:
  Eliminate latin1 encoded characters
Fix slow compilation of complex guards

beam_utils:is_not_used_at/3 could be very slow for complex guards,
because the cached result for previously encountered labels were
neither used nor updated within blocks.

Reported-by: Magnus Müller
Merge branch 'bjorn/compiler/fix-slow-compilation/OTP-10939' into maint

* bjorn/compiler/fix-slow-compilation/OTP-10939:
  Fix slow compilation of complex guards
Update primary bootstrap