bump version to 1.6.0-rc1

NEWS

+Knot DNS 1.6.0-rc1 (2014-10-13)
+===============================
+
+Features:
+---------
+ - Persistent timers for slave zones
+
+Bufixes:
+--------
+ - RFC compliant processing of letter case in RDATA domain names
+
 Knot DNS 1.5.3 (2014-09-15)
-==========================
+===========================
 
 Bugfixes:
 ---------
@@ -10,7 +21,7 @@ Bugfixes:
  - Knot failed to send large messages to remote control (present since 1.5.1)
 
 Knot DNS 1.5.2 (2014-09-08)
-==========================
+===========================
 
 Bugfixes:
 ---------

configure.ac

 #                                               -*- Autoconf -*-
 
 AC_PREREQ([2.60])
-AC_INIT([knot], [1.5.3], [knot-dns@labs.nic.cz])
+AC_INIT([knot], [1.6.0-rc1], [knot-dns@labs.nic.cz])
 AM_INIT_AUTOMAKE([gnits subdir-objects dist-xz -Wall -Werror])
 AM_SILENT_RULES([yes])
 AC_CONFIG_SRCDIR([src/knot/main.c])