SIOC_IF_ALIAS_ADD, SIOC_IF_ALIAS_REMOVE, SIOC_IF_ALIAS_GET, SIOC_ALIAS_SET,
and SIOC_IF_ALIAS_COUNT.
* Implemented all of those new ioctls, though they are yet untested.
* Added ifreq::ifr_data, and removed the hack in the FreeBSD compat if.h
header.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37806 a95241bf-73f2-0310-859d-f6bbb57e9c96