* cmdline/apt-cache.cc:
- make the search multiarch compatible by using GrpIterator instead
- use pkgCacheFile and the new CacheSets all over the place
+ - add --target-release option (Closes: #115520)
* apt-pkg/cachefile.{cc,h}:
- split Open() into submethods to be able to build only parts
- make the OpProgress optional in the Cache buildprocess