Merge branch 'maint'

* maint:
  tests: look for '.lo' rather than '.o' object when using Libtool with C++
  cosmetics: few typofixes in older ChangeLogs, suggested by "codespell.py"
  tests: add basic semantic tests on C++ support
  tests: minor tweak to 't/objc-megademo.sh'

diff --cc t/list-of-tests.mk
Simple merge

diff --cc t/objc-megademo.sh
Simple merge