Bump version to 0.0.91.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3837 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/unix/configure.ac b/unix/configure.ac
index 62cc3f8..f903dfc 100644
--- a/unix/configure.ac
+++ b/unix/configure.ac
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ([2.57])
-AC_INIT([tigervnc], [0.0.90], [http://www.tigervnc.org])
+AC_INIT([tigervnc], [0.0.91], [http://www.tigervnc.org])
 AM_INIT_AUTOMAKE([-Wall foreign dist-bzip2])
 
 AC_SUBST([COMMON_DIR], ['$(top_srcdir)/../common'])