[PATCH] Support of UCS2 for SMS/USSD

Hi list, Attached 3 patches for decoding UCS2 MT-SMS and incoming USSD. Main idea: convert UCS2 text to UTF-8, check if terminal supports UTF-8 and if yes - print, otherwise - print in hex, and notify VTY to check mobile log (since we can't send UTF text to VTY, if someone knows how to do it - please tell me). Waiting for comments. Thanks, Pavel