#15421: fix an OverflowError in Calendar.itermonthdates() after datetime.MAXYEAR.  Patch by Cédric Krier.

  tools (dpkg-dev) installed.

Issue #15144: Fix possible integer overflow when handling pointers as integer values, by using Py_uintptr_t instead of size_t.
Patch by Serhiy Storchaka.

Issue #15977: Fix memory leak in Modules/_ssl.c when the function _set_npn_protocols() is called multiple times

(Compiler: Solaris Studio 12.3)

Required on Solaris 10 (which defines AT_FDCWD as 0xffd19553),
harmless on other platforms.