+ * Apply patch by Christian Hofstaedtler <ch+git@zeha.at> (thanks!):
+ Ensure /etc/mtab is always present. Newer debootstrap versions
+ no longer create /etc/mtab, so we need to provide our own.
+ * config/hooks/instsoft.GRMLBASE: force installation of file-rc using
+ aptitude's Aptitude::ProblemResolver::Keep-All-Tier option.