Changed the variants to copy a config file only if it is different than the current config file. This corrected a problem which was causing the kernel to be rebuilt on every run of buildmistify.
Changed the variants to copy a config file only if it is different
than the current config file. This corrected a problem which was
causing the kernel to be rebuilt on every run of buildmistify.

mistifyio/mistify-os,trisk/mistify-os,mistifyio/mistify-os,mistifyio/mistify-os,trisk/mistify-os,trisk/mistify-os