Fix typo in configure script regarding --disable-vty
diff --git a/configure.in b/configure.in
index cc8fdf6..b5eea6b 100644
--- a/configure.in
+++ b/configure.in
@@ -44,7 +44,7 @@
 	[enable_tests=0], [enable_tests=1])
 AM_CONDITIONAL(ENABLE_TESTS, test "x$enable_tests" = "x1")
 
-AC_ARG_ENABLE(vtyc,
+AC_ARG_ENABLE(vty,
 	[  --disable-vty Disable building VTY telnet interface ],
 	[enable_vty=0], [enable_vty=1])
 AM_CONDITIONAL(ENABLE_VTY, test "x$enable_vty" = "x1")