[balsa] (54 commits) Non-fast-forward update to branch balsa-2.5-gmime-2.6

[Peter Bloomfield <peterb src gnome org>]

The branch 'balsa-2.5-gmime-2.6' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  9b19c66... fix NULL server-identity TLS warning with recent gio

Commits added to the branch:

  09fb37f... Bump GMime requirement to 3.2.4 (*)
  bd90b5e... Insert a NULL GMimeFormatOptions (*)
  3f34d5d... internet_address_list_parse_string() replaced (*)
  9f4f2db... More GMime 3 changes (*)
  2566754... g_mime_content_type_to_string() has been renamed (*)
  eb45aca... g_mime_parser_construct_message() (*)
  40310eb... g_mime_content_type_new_from_string() (*)
  8fd0163... More GMime3 changes (*)
  488bfdd... g_mime_filter_crlf_new() is no more (*)
  0e79543... g_mime_filter_crlf_new() is no more (*)
  da298e4... Insert a NULL format-options argument (*)
  42a6e7b... Add parser-options argument (*)
  03b22ef... g_mime_part_set_content_object() has been renamed (*)
  cc834ca... Include libbalsa.h (*)
  b3989ac... g_mime_init() has no arguments (*)
  2cc9e7a... Oops--use g_mime_filter_dos2unix_new() (*)
  ed99b2b... g_mime_parser_set_scan_from() has been replaced (*)
  3663b88... g_mime_parser_get_from_offset() has been renamed (*)
  eeb6a8a... g_mime_parser_get_from() has been renamed (*)
  962c2fb... g_mime_object_set_header() has an extra argument (*)
  ce1382b... Oops--missed one case (*)
  980fd48... GMimeHeaderIter has been replaced (*)
  c330f93... GMimeRecipientType has been replaced (*)
  3b2c55f... Cleanup (*)
  0f9b4f2... g_mime_references_decode() has been replaced (*)
  e73e5b0... Oops--missed one case (*)
  eae668b... g_mime_utils_header_encode_text() (*)
  09157e3... New API for g_mime_utils_header_encode_text() (*)
  fa001e2... New API for g_mime_utils_header_decode_date() (*)
  4ee77dc... g_mime_set_user_charsets() has been replaced (*)
  a02ed7f... g_mime_object_new_type() has a new first argument (*)
  a09de87... Oops--typo (*)
  0db48d0... g_mime_message_set_{reply_to,sender} (*)
  5773300... g_mime_message_set_subject() has a new argument (*)
  111611f... Cleanup (*)
  3c8b810... g_mime_object_append_header() has a new argument (*)
  fb3e54b... Drop redundant get_tz_offset() (*)
  66e7f96... Adapt to new g_mime_utils_header_decode_date() API (*)
  494dca7... Guard against passing NULL name (*)
  7393dc9... Check for NULL return (*)
  fdb5220... Fix some porting to g_mime_filter_dos2unix_new() (*)
  b03f1a2... Fix some porting to g_mime_filter_dos2unix_new() (*)
  0b2819f... Do not unref GDateTime (*)
  8e95b33... mailbox_mbox: Set the parser format to mbox (*)
  f330ef7... libbalsa-message: Save some dereferencing (*)
  33dfbe8... GMimeParser changes (*)
  378fcde... GMime3 (3.2, at least) supports Autocrypt headers (*)
  ccf38af... autocrypt: Convert e-mail addresses to lowercase. (*)
  b022b17... Bump GMime required version to 3.2.6 (*)
  a7d81b7... Merge branch 'gmime3' into 'master' (*)
  e8952e3... fix NULL server-identity TLS warning with recent gio (*)
  45223b5... Merge branch 'fix_missing_tls_server_identity' into 'master (*)
  0ae0fde... Improve TLS certificate validation error message (*)
  e9d6610... Merge branch 'invald_tls_cert_message' into 'master' (*)

(*) This commit already existed in another branch; no separate mail sent