Partial fix to making work in busybox/cerowrt ash
Initial checkin from Sebastian Moeller
Update comments at head of script to make clear which radio is being tested; add ifconfig; display output file name in "Done..." message; fixed typo in 'date' output
Added "[ ... ]" to command echo's in output file
Tidied up header comments
Both netperfwrapper.sh and betterspeedtest.sh allow multiple streams in each direction.

These scripts initiate several concurrent streams to "fill up the pipe".

Default for netperfwrapper.sh is 4, to emulate RRUL test
Default for betterspeedtest.sh is 5, empirically chosen to load up the link: more than 5 streams didn't seem to make a difference in transfer rate

Same code works in bash and CeroWrt's ash.