Change development version to 1.6.80
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d788b60..755cccb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,10 +18,10 @@
 include(CMakeMacroLibtoolFile)
 
 project(tigervnc)
-set(VERSION 1.5.80)
+set(VERSION 1.6.80)
 
 # The RC version must always be four comma-separated numbers
-set(RCVERSION 1,5,80,0)
+set(RCVERSION 1,6,80,0)
 
 # Installation paths
 set(BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin")