Bumped library versions, to nettle-4.5 and hogweed-2.3.

ChangeLog

 2013-01-02  Niels Möller  <nisse@lysator.liu.se>
 
+	* configure.ac (LIBNETTLE_MINOR): Bumped library version, to 4.5.
+	(LIBHOGWEED_MINOR): And to 2.3.
+
 	* examples/Makefile.in: Explicit rules for building objects in
 	parent directory.
 	* tools/Makefile.in: Likewise.

NEWS

@@ -62,6 +62,11 @@ NEWS for the 2.6 release
 	SHA2) refer to 256-bit SHA2 as "SHA-256" or "SHA256" rather
 	than "SHA2-256".
 
+	The libraries are intended to be binary compatible with
+	nettle-2.2 and later. The shared library names are
+	libnettle.so.4.5 and libhogweed.so.2.3, with sonames still
+	libnettle.so.4 and libhogweed.so.2
+
 NEWS for the 2.5 release
 
 	This release includes important portability fixes for Windows

configure.ac

@@ -11,10 +11,10 @@ AC_CONFIG_AUX_DIR([.])
 AC_CONFIG_HEADER([config.h])
 
 LIBNETTLE_MAJOR=4
-LIBNETTLE_MINOR=4
+LIBNETTLE_MINOR=5
 
 LIBHOGWEED_MAJOR=2
-LIBHOGWEED_MINOR=2
+LIBHOGWEED_MINOR=3
 
 AC_CANONICAL_HOST