[FYI] Patch

I've commited a quick and dirty patch :P

For some reason, our smsc got confused and lost the sessions but not the
socket connection, therefore replying to every 51 and 31 with a 
<^B27/00065/R/51/N/04/ Message not accepted, waiting for password/FF^C>

I've tryied to send an login packet when receiving a NACK+04, but
when I do it, sockets gets EOF and connection dies, so the "dirty" part
of the patch is to just reconnect to smsc (if retry = true in config!)
to resend the authentication.

I've done some changes to smsbox to avoid joining the to list in a 
string and later split it, I mean, if I already have the list, I'll
just pass it to req_handle.

I hate late night and over-work patch times....