Fix typo in stand/rc for $vnddirs.

This function was only used in the failure case and may not have been noticed.
Per boot(8), this is already the default.
Merge pull request #21 from bconway/miscfixes

Misc. fixes
Make better use of X-core systems for kernel compiles.
Merge pull request #24 from bconway/makejx

Make better use of X-core systems for kernel compiles.
Merge remote-tracking branch 'upstream/master'