NAT-T: new style uses setsockopt and old (KLIPS-only) uses ioctl
Use $(CC) for the version test since that's different from gcc when
cross-compiling.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Use pidof instead of ps -C in _realsetup as the former is guarantied to
be available even on minimal installs. Closes Debian bug #719126.
Merge remote-tracking branch 'github/sdeziel-dev'
Merge remote-tracking branch 'github/sdeziel-natt'