Update ChangeLog and bump version for v2.5.3 release

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

ChangeLog.md

@@ -4,7 +4,7 @@ ChangeLog
 All notable changes to the project are documented in this file.
 
 
-[v2.5.3][UNRELEASED] - 2021-09-2x
+[v2.5.3][] - 2021-09-23
 -----------------------
 
 ### Changes
@@ -16,6 +16,7 @@ All notable changes to the project are documented in this file.
 - Fix build warning with `--disable-mrdisc` configure option
 - Fix #167: cannot remove routes added with `smcroutectl add`,
  only affects add/del at runtime with smcroutectl, not .conf reload
+- Fix #168: build problem on Debian/kFreeBSD, used wrong queue.h
 
 
 [v2.5.2][] - 2021-08-27
@@ -589,7 +590,7 @@ Initial public release by Carsten Schill.
 
 [mrdisc]: https://github.com/troglobit/mrdisc
 [RFC4286]: https://tools.ietf.org/html/rfc4286
-[UNRELEASED]: https://github.com/troglobit/smcroute/compare/2.5.2...HEAD
+[UNRELEASED]: https://github.com/troglobit/smcroute/compare/2.5.3...HEAD
 [v2.5.3]: https://github.com/troglobit/smcroute/compare/2.5.2...2.5.3
 [v2.5.2]: https://github.com/troglobit/smcroute/compare/2.5.1...2.5.2
 [v2.5.1]: https://github.com/troglobit/smcroute/compare/2.5.0...2.5.1

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.61)
-AC_INIT(SMCRoute, 2.5.3-beta1, https://github.com/troglobit/smcroute/issues, smcroute, https://troglobit.com/smcroute.html)
+AC_INIT(SMCRoute, 2.5.3, https://github.com/troglobit/smcroute/issues, smcroute, https://troglobit.com/smcroute.html)
 AC_CONFIG_AUX_DIR(aux)
 AM_INIT_AUTOMAKE([1.11 foreign])
 AM_SILENT_RULES([yes])