Replaced `echo` by `printf` in configuration script
Replaced `echo` by `printf` in configuration script

In FreeBSD's sh implementation, the echo command only accepts either -e or -n,
but not both. However, to split output with (color) escape sequences on several
lines, both options would be needed. Therefore, the `echo -en` instructions
have been replaced by `printf`.

daemotron/yajam