merge along w/ fix for issue #2107 (commit c9239171e429)

diff --cc Modules/signalmodule.c
index fedaddff356cd2fa7e74a812d647403ec76b0d22,c648bde24e9b7311323fe7ce0337ebdc85d36f2c..cf4ba6123ab2c91b3b46ab267ac2a160856ca84d
--- 1/Modules/signalmodule.c
--- 2/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@@ -956,7 -956,7 +956,7 @@@ the first is the signal number, the sec
  
  static struct PyModuleDef signalmodule = {
      PyModuleDef_HEAD_INIT,
--    "signal",
++    "_signal",
      module_doc,
      -1,
      signal_methods,