* automake.in (&handle_configure): Use the config.status 2.50 invocation syntax for config files and headers. autoheader needs the name of the file to create, not from what it must be created, hence CONFIG_HEADER_FULL is $one_name, not $one_fullname. * lib/am/configure.am, lib/am/remake-hdr.am: Likewise. * tests/confsub.test (SUBDIRS): Adjust to the new config.status invocation. Strengthen: Use the non-default config.hin source. Strengthen: Make sure config.h is properly updated when config.hin is changed.