Here we store Conan recipes invoked by ../conanfily.py + .github/ workflow(s) in the rare/transient caseswhere a certain recipe is not (yet, usually) in conan-center.  (Conceivably perhaps we need one of our ownor to modify one in conan-center, but as of this writing it has not been needed.)  ../conanfily.py shallexplain such cases.Generally, we'd prefer this directory to be empty.To the extent a given recipe *is* in it, we prefer it to be entirely someone else's work without our modifications.(The precipitating/first example was a Boost version recipe from an in-progress conan-center Pull Request not yetmerged and hence not officially in conan-center proper.)  Our license header shall be omitted in these cases, as itis not our code.