loadrecipe: relax the flavor matching used to find autoLoadRecipes
loadrecipe: relax the flavor matching used to find autoLoadRecipes

In particular, this caused a big headache when the repos was a
TroveListTroveSource rather than a repository as the "search as
database" mode was looking for exact flavor matches which would never
exist.  Wrapping the source in a NetworkSearchSource restores the usual
flavor-matching behavior of a network source.

sassoftware/conary,sassoftware/conary,sassoftware/conary,sassoftware/conary,sassoftware/conary