merge: upstream fixes (mutt/default)

merge: upstream fixes (mutt/default)

 * Remove the $locale configuration variable.
 * Add $attribution_locale configuration variable.
 * Add missing include <locale.h> to send.c and edit.c.
 * Filter out zero width no-break space (U+FEFF).
 * Update a confusing and obsolete comment.
 * Moves mutt_copy_list to muttlib.c, where it belongs.
 * Redraw screen after an SSL cert prompt
 * Preserve message-id and mft headers for recalled messages. (closes #3081)
 * Fix openssl 1.1 compilation issues. (closes #3870)