From: "Daniel T. Lee" <redacted>
Date: Sat, 29 Jun 2019 22:33:57 +0900

This commit adds port parsing and port validate helper function to parse
single or range of port(s) from a given string. (e.g. 1234, 443-444)

Helpers will be used in prior to set target port(s) in samples/pktgen.

Signed-off-by: Daniel T. Lee <redacted>

Applied.