* m4/Makefile.am: Update the list of the *.m4 files.
* m4/Makefile.am: Remove isc-posix.m4, it's obsolete. * m4/isc-posix.m4: Remove.
m4 directory is used by aclocal. * m4/Makefile.am: New file. * configure.in: Substitute m4/Makefile. * autogen.sh: Don't copy any macro files, use m4 directory.