[lsof] IPv6 support
[lsof] IPv6 support

The lsof Makefile uses grep to search for constants in standard header
files to determine whether to enable IPv6. LSOF_INCLUDE sets where it
should look for those header files. Setting this variable correctly
results in IPv6 support being enabled.

Signed-off-by: Steven Danna <9ce5770b3bb4b2a1d59be2d97e34379cd192299f@chef.io>

be-plans/be,be-plans/be,be-plans/be,be-plans/be