Add IFS to accept filename with <space> char.
Add "wait" after "spawn" to avoid zombie process.
Add "tel.sh" script to support handy operation under busybox

Intro:
A shell script inline with expect script to support below features
1. telnetd enabled
2. put .bashrc_bb (.bashrc for busybox) through ftp
3. auto login with provided username, password

Usage: tel.sh <device ip> <user> <pass>