Dev remove runmode auto v2.1

Hello,

Here's the patchset using a ioctl to get the number of RSS queues and using it to lower the number of capture threads if necessary.

PR builds:
- PR build: https://buildbot.openinfosecfoundation.org/builders/regit/builds/20
- PR pcaps: https://buildbot.openinfosecfoundation.org/builders/regit-pcap/builds/18