FTP Server Response Buffer Overflow

When storing an FTP server's error message on failure, there was no check for input length and thus a malicious FTP server could overflow curl's stack based buffer...

mail.local.diff

688a689,698 define MAXMSGLEN 65536 / Make sure message is less than MAXMSGLEN / if ftellfp MAXMSGLEN syslogLOGDEBUG,"Message too long - %i bytes limit is %i\n", ftellfp,MAXMSGLEN; exit1;...