[L] Change in upf-benchmark[master]: Introduce osmo-udp-responder

Attention is currently required from: pespin.

laforge has posted comments on this change by pespin. ( https://gerrit.osmocom.org/c/upf-benchmark/+/38328?usp=email )

Change subject: Introduce osmo-udp-responder ......................................................................

Patch Set 1:

(1 comment)

File src/osmo-udp-responder/udp_responder.c:

https://gerrit.osmocom.org/c/upf-benchmark/+/38328/comment/381455a3_1a221c10... : PS1, Line 55: st if we implement our own cmdline parser rather than using glibc getopt_long, I would expect at least some kind of comment on why this is required. So let's please add a comment that explains what this parser does different from getopt_long and why we need it to achieve our goal.