* m4/absolute-header.m4: Renamed from full-header-path.m4. This is to keep the terminology clean; POSIX talks about "absolute pathnames", not "full pathnames", but the GNU Coding Standards say to use "path" for something else; so use "absolute" to keep both sides happy. (gl_ABSOLUTE_HEADER): Renamed from gl_FULL_HEADER_PATH. Set gl_absolute_header, not gl_full_header_path. Set gl_cv_absolute_<header>, not gl_full_path_<header>. Define ABSOLUTE_<HEADER>, not FULL_PATH_<HEADER>. All uses changed.