* saa/add_default_value_for_maps_get/OTP-11951:
  stdlib: Fix indentation of maps doc
  Add docs and test for maps:get/3
  Add default value for maps:get

* nox/fix-eval-map-update/OTP-11922:
  Fix evaluation of map updates in the debugger and erl_eval

* bjorn/stdlib/erl_tar/OTP-11854:
  Correct typo in type specification
  Fix typo in erl_tar docs
  Update information about compatibility
  Correct end of tape marker
  Support path names with characters outside the US ASCII range

* siri/cuddle-with-tests:
  Fix regexp in release_handler test so versions are correctly replaced
  Update kernel, stdlib and sasl appup tests
  Minor update to test_server for finding old releases

The POSIX standard for tar says that there must be at least
two 512-bytes zero blocks at the end of the tar archive file.

Our implementation would only emit a single 512-byte zero block if the
size of the last file was in the range 18*512 through 19*512-1 (modulo
20*512). GNU tar would correctly unpack such tar archive file, but
would emit a warning:

   tar: A lone zero block at 20

* bjorn/stdlib/file_lib-wildcard/OTP-11850:
  filelib:wildcard() should show broken symlinks

Reported-by: José Valim

Add test of update instructions from current major to current
minor. Earlier only previous major to current was tested.

When redefining and exporting the type map() erl_lint erroneously
emitted an error. This bug has been fixed.