Prevent double base64 encoding of attachments when signing (#5014).
Restrict adding outgoing footer to text/plain messages.
Add find_charset helper and use where is needed.
Handle non-ascii headers. Closes #5021.
Add changes file for #5021.
Merge remote-tracking branch 'refs/remotes/ivan/bug/5021_handle-non-ascii-headers' into develop
Merge remote-tracking branch 'refs/remotes/drebs/bug/5014_fix-attachment-processing-when-signing' into develop
Properly parse apple mail
Merge remote-tracking branch 'chiiph/bug/properly_parse_apple_mail' into develop
memory store for append/fetch/copy
move server to its own file
add enum dependency
split messageparts
move utilities
add soledadstore class