- prereq.c (conflicts, resolve, prereq): renamed "conflicts" to
"old_conflicts"
- prereq.c (new_conflicts, resolve, prereq): also test whether any of the
conflicts of the package we're about to add matches an installed or
considered package
- test/conflict, test/instconf: test for conflicts introduced by package
about to be added
- prereq.c (conflicts): detect conflicts
- prereq.c (prereq): pass list of conflicts of initial package
- test/conflict: regression test for basic conflict handling
- TODO: updated for partial implementation of conflicts