iperf 3.0.2 (new formula)

Net performance measurement tool.
iperf3: add 3.0.2 bottle.

Closes #24971.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
pastebinit 1.4.1 (revised)

Use where we installed `pastebin.d` instead of the location provided in the script. This shouldn't affect most users.
pastebinit: add 1.4.1 bottle.