[nfv.config] Add real-scale integration tests for `snabbnfv-traffic'
based on `bench_env'.
[lib.nfv] selftest.sh: Added rudimentary filter test.
[lib.nfv] selftest.sh: Disable test cases known to fail.
add test for local-only switch features
receive buffer size configurable.  ignores given freelist if any buffer is too small
couple silly typos
don't pretest buffers, if anyone doesn't measure up, replace with a freshly allocated one
adapt buffer size to those offered.  free unusable buffers
remove rx_buffsize API
very draft receive checksum offload
fix typos
add transmit checksum offload
make the "insert checksum" bits of TXDESC reflect the current context
Merge pull request #280 from eugeneia/lib_nfv-selftest

[nfv.config] Add real-scale integration tests for `snabbnfv-traffic'
Merge pull request #275 from javierguerragiraldez/offload

Intel10G: transmit/receive checksum offload
Merge pull request #274 from javierguerragiraldez/intel_fixups

Intel10g: rx_buffsize config and check
Revert "Merge pull request #275 from javierguerragiraldez/offload"

This reverts commit 5f783326e5a10e6a6e69a725bbaa95392ef56d8b, reversing
changes made to c2b2ca47c9b4903b3fcdc4814c115f539d36e3eb.
Merge pull request #284 from virtualopensystems/revert_offloading

Revert "Merge pull request #275 from javierguerragiraldez/offload"

TX checksum offload feature was merged prematurely
[neutron2snabb] Use hex-string as input to `l2tpv3_*_cookie'.
[keyed_ipv6_tunnel] Accept hex encoded string instead of plain string.
[lib.hex] Added `undump'.
[neutron2snabb] Use `vif_details.zone_ip' instead of
`vif_details.l2tpv3_local_ip'.