[RFT v2] test-pmd: go back to using cmdline_interact

[Ling, WeiX]

> -----Original Message-----
> From: Stephen Hemminger <stephen at networkplumber.org>
> Sent: Tuesday, March 14, 2023 5:39 AM
> To: dev at dpdk.org
> Cc: Stephen Hemminger <stephen at networkplumber.org>
> Subject: [RFT v2] test-pmd: go back to using cmdline_interact
> 
> The cmdline library poll function is broken on Windows and was never tested,
> don't use it.
> 
> Instead, use sigaction() to cancel read character on Unix OS's and a new
> helper to cancel I/O on Windows.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---

Tested-by: Wei Ling <weix.ling at intel.com>