Mailnagger 2.2.1

Mailnagger version 2.2.1 (2024-10-16)

• Mailnag is forked. The name is changed to Mailnagger.
  (#1)

• setup.py updated. Hacked it to support system wide installation.

• Fixed unit tests (pulb/mailnag#250)

• Fixed maildir bug about missing method
  (pulb/mailnag#249 which fixes
  pulb/mailnag#224)

• Merged Python 3.12 related issues
  (pulb/mailnag#232 which fixes IMAP issues
  pulb/mailnag#244 and
  pulb/mailnag#245)

• Translation files updated. Not much actually changed but newest
  gettext tools seems to reorder entries.

• Fixed Glib exception handling in conntest
  (pulb/mailnag#220)