Enhancements:
-------------

* add get_used_loop_vars() function to MetaData object, to show which loop variables are actually used by recipe  #2410
* Allow multiple file extensions for pypi skeletons, not just .tar.gz  #2412

Bug fixes:
----------

* make build reqs equivalent to host when cross-compiling and no host section present (helps reduce need to modify python-only recipes)  #2406
* reduce logging output from filelock and conda  #2418 #2422
* Don't strip files in noarch: python when they are not known file types  #2420
* fix infinite loop when trying to build dep from found recipe, but that recipe is wrong version  #2423
* update perl used on appveyor for testing to 5.26