From: Tzafrir Cohen <tzafrir@debian.org>
Subject: add extra digit to library SO name: 2.0

Asterisk and various other programs were already looking for that SO
name.

diff --git a/configure.ac b/configure.ac
index 826a7ec..2afe476 100644
--- a/configure.ac
+++ b/configure.ac
@@ -392,5 +392,6 @@ AC_CONFIG_FILES([
 	xpp/perl_modules/Makefile
 	])
 AC_OUTPUT
+sed -i -e '/^soname_spec=/s/major/&.\\$revision/' libtool
 
 AC_MSG_NOTICE(*** dahdi-tools build successfully configured ***)