This is for supporting tagging software collections (SC), if you have
installed meta package of SC then then name of package is different.
I.e. if you are tagging rubygem-foo package and you have ruby193-build
installed then the name of package is ruby193-rubygem-foo.
This adds a new option, changelog_format, which allows specifying the
full format of generated changelog entries. This also deprecates use
of changelog_with_email, since it is a subset of a fully-customizable
changelog format.