aclocal flags are a pain

[Behdad Esfahbod]

Hi again,

To use an m4/ dir one has to modify three places:

  * autogen.sh: add "-I m4" to their aclocal invocation (ok, I know autoreconf
prolly handles it),

  * configure.ac: add AC_CONFIG_MACRO_DIR(m4)

  * Makefile.am: add ACLOCAL_AMFLAGS = -I m4

This makes no sense.  aclocal should scan configure.ac and pick up the flags,
and automake should use the configure.ac stuff to generate the correct aclocal
rerun rule.

behdad