Issue #19106: Touch generated files to be 1s newer than their youngest source.
Issue #19106: Add buildbottouch target.
Add a "skull and crossbones" to Py_AddPendingCall.
Issue #12641: Avoid passing "-mno-cygwin" to the mingw32 compiler, except when necessary.
Patch by Oscar Benjamin.
Minor doc fix in urllib.parse.rst
Issue #18594: Fix the fast path for collections.Counter().

The path wasn't being taken due to an over-restrictive type check.