update to linux_base-c6

[Warren Block]

On Tue, 30 Sep 2014, William A. Mahaffey III wrote:
> Well .... after a bit of messing around, I determined that I couldn't find 
> any linux-c6 packages for FBSD 9.3, so I went the ports route:
>
> [root at kabini1, /etc, 3:30:43pm] 588 % (cd /usr/ports/emulators/linux_base-c6; 
> make install clean); cd .
> ===>  linux_base-c6-6.5 compat.linux.osrelease: 2.6.16 is not supported, 
> please use 2.6.18, BEWARE this is highly experimental.
> *** [install] Error code 1
>
> Stop in /usr/ports/emulators/linux_base-c6.
> [root at kabini1, /etc, 3:30:59pm] 589 %
>
> .... & didn't get very far :-/ .... Any clues for me ? TIA ....

Always, yes *always*, read /usr/ports/UPDATING before updating or 
installing new ports.  The 20140922 entry pertains to the c6 ports. 
There is more, but this particular problem means to run

# sysctl compat.linux.osrelease=2.6.18

and add

   compat.linux.osrelease=2.6.18

to /etc/sysctl.conf.