0.81 update
diff --git a/configure b/configure
index 03c3a18..757a50c 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.57 for openggsn 0.80.
+# Generated by GNU Autoconf 2.57 for openggsn 0.81.
 #
 # Report bugs to <jj@openggsn.org>.
 #
@@ -427,8 +427,8 @@
 # Identity of this package.
 PACKAGE_NAME='openggsn'
 PACKAGE_TARNAME='openggsn'
-PACKAGE_VERSION='0.80'
-PACKAGE_STRING='openggsn 0.80'
+PACKAGE_VERSION='0.81'
+PACKAGE_STRING='openggsn 0.81'
 PACKAGE_BUGREPORT='jj@openggsn.org'
 
 ac_unique_file="gtp/gtp.c"
@@ -946,7 +946,7 @@
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures openggsn 0.80 to adapt to many kinds of systems.
+\`configure' configures openggsn 0.81 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1012,7 +1012,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of openggsn 0.80:";;
+     short | recursive ) echo "Configuration of openggsn 0.81:";;
    esac
   cat <<\_ACEOF
 
@@ -1110,7 +1110,7 @@
 test -n "$ac_init_help" && exit 0
 if $ac_init_version; then
   cat <<\_ACEOF
-openggsn configure 0.80
+openggsn configure 0.81
 generated by GNU Autoconf 2.57
 
 Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
@@ -1125,7 +1125,7 @@
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by openggsn $as_me 0.80, which was
+It was created by openggsn $as_me 0.81, which was
 generated by GNU Autoconf 2.57.  Invocation command line was
 
   $ $0 $@
@@ -9398,7 +9398,7 @@
 
 # Define the identity of the package.
  PACKAGE=openggsn
- VERSION=0.80
+ VERSION=0.81
 
 
 cat >>confdefs.h <<_ACEOF
@@ -10032,7 +10032,7 @@
 } >&5
 cat >&5 <<_CSEOF
 
-This file was extended by openggsn $as_me 0.80, which was
+This file was extended by openggsn $as_me 0.81, which was
 generated by GNU Autoconf 2.57.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -10098,7 +10098,7 @@
 
 cat >>$CONFIG_STATUS <<_ACEOF
 ac_cs_version="\\
-openggsn config.status 0.80
+openggsn config.status 0.81
 configured by $0, generated by GNU Autoconf 2.57,
   with options \\"`echo "$ac_configure_args" | sed 's/[\\""\`\$]/\\\\&/g'`\\"
 
diff --git a/doc/Makefile b/doc/Makefile
index e33e818..62a896d 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -82,7 +82,7 @@
 PACKAGE = openggsn
 RANLIB = ranlib
 STRIP = strip
-VERSION = 0.80
+VERSION = 0.81
 am__include = include
 am__quote = 
 install_sh = /home/jj/openggsn/install-sh