Change Password
Verifies the old password for an account, if successful the password is then changed to a new value.
Signature: change(cinfo)
Parameters:
cinfo['acctid'] - The account the password should be changed on
cinfo['newpw'] - The new password that should be set
cinfo['oldpw'] - The old password that should be verified
Return Value:
ACSuccess 0
ACUnknownError 1
ACOperationNotSupported 2
ACInvalidUser 7
ACAccessDenied 11
ACVerifyFailed 14
ACPasswordLocked 26
ACPasswordExpired 27
ACAccountExpired 28
ACAccountDisabled 29