minor, provide strndup() replacement xstrndup()
Merge branch 'bld/non-gnu'

* bld/non-gnu:
  minor, provide strndup() replacement xstrndup()
minor, provide a handy automake include file
Merge branch 'feat/automake-include-file'

* feat/automake-include-file:
  minor, provide a handy automake include file