We were redirecting in some error-cases, which this commit sorts out:
- package count == 1 and package base name != package name
- was redirecting to {name} and not the only associated Package

Now, when we have a package base name that mismatches its only
package, we display the package base page. Otherwise, we redirect
to the first package's page.

Closes #282

Signed-off-by: Kevin Morris <kevr@0cost.org>