Add libtool support.

libzebra and libospfapiclient are now built shared, and linked shared
with the daemons.  This reduces the memory needed when running
multiple daemons; each daemon is at least 150k smaller.  Static
libraries are still built, and libtool should use them on platforms
which don't have shared libaries.  As with autoconf, the user of a
distribution does not need libtool; one just needs that to build from
CVS.

libospf.a is still a non-shared library, and still installed, not
because that makese sense, but because I don't understand why it is
the way it is now.

Note that the tree was tagged 'libtool-before' just before this commit.
diff --git a/ChangeLog b/ChangeLog
index afdb9ef..cba0499 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2004-06-30  Greg Troxel  <gdt@poblano.ir.bbn.com>
 
+	* */Makefile.am: use -L../lib -lzebra, so we pick up the shlib
+	version of libzebra when available.
+
+	* configure.ac, update-autotools: Add libtool.
+
+2004-06-30  Greg Troxel  <gdt@poblano.ir.bbn.com>
+
 	* Makefile.am: add files to EXTRA_DIST rather than copying, and
 	omit the kludgy cleaning steps, which were failing when the list
 	to clean was empty.