* src/imap.[ch]: added imap_add_msg(), and imap_append_message(),
which appends file into IMAP4 folder.
+ imap_status(): new.
+ imap_create_folder(): check the existence of a folder before
+ create it.
+ renamed the prefix of low-level IMAP4rev1 functions to imap_cmd.
+ * src/account.c: account_add(), account_set_missing_folder():
+ create INBOX automatically when creating IMAP4 account.
2001-06-07