get_all_msg_headers).
Added new method: get_user_votes(msg number, user name or alias)
The user name or alias must match the posting configuration on the local
system (i.e. if set for real names, pass the user's real name instead of alias).
This function returns 0 for no votes on the reference message, 1 for an
up-vote, 2 for a down-vote or in the case of a poll-response, a bit-field of
votes.