build: tag version as 0.99.25-dev

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/configure.ac b/configure.ac
index 4d52eef..2c72cff 100755
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@
 ##
 AC_PREREQ(2.53)
 
-AC_INIT(Quagga, 0.99.24, [https://bugzilla.quagga.net])
+AC_INIT(Quagga, 0.99.25-dev, [https://bugzilla.quagga.net])
 CONFIG_ARGS="$*"
 AC_SUBST(CONFIG_ARGS)
 AC_CONFIG_SRCDIR(lib/zebra.h)