OP_MAIN_FIRST_MESSAGE and OP_MAIN_LAST_MESSAGE were added to the
code 19 years ago. They weren't used then; they haven't been used since.
OP_MAIN_IMAP_FETCH "force retrieval of mail from IMAP server"
OP_MAIN_IMAP_LOGOUT_ALL "logout from all IMAP servers"
OP_MAIN_FETCH_MAIL "retrieve mail from POP server"
-OP_MAIN_FIRST_MESSAGE "move to the first message"
-OP_MAIN_LAST_MESSAGE "move to the last message"
OP_MAIN_LIMIT "show only messages matching a pattern"
OP_MAIN_LINK_THREADS "link tagged message to the current one"
OP_MAIN_NEXT_UNREAD_MAILBOX "open next mailbox with new mail"